Top 10 Network Engineer Interview Questions

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1. What experience do you have with network troubleshooting and problem resolution?

Purpose: To gauge the candidate's hands-on experience with diagnosing and resolving network issues.

Answer: "In my previous role, I managed a network of over 500 devices. When we experienced a network outage, I quickly identified the problem as a failed router. I replaced the router and reconfigured it, restoring network connectivity within an hour."

Why it works: This answer demonstrates the candidate's ability to identify, diagnose, and resolve network issues efficiently, showcasing their problem-solving skills and technical expertise.

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2. Can you explain the difference between a hub, a switch, and a router?

Purpose: To assess the candidate's understanding of fundamental network components.

Answer: "A hub is a basic networking device that connects multiple devices and broadcasts data to all of them. A switch is more advanced and only sends data to the specific device, improving network efficiency. A router connects different networks and routes data between them, often providing additional features like DHCP and firewall capabilities."

Why it works: This answer clearly explains the different network devices and their functions, indicating a strong foundational knowledge of networking.

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3. How do you ensure network security in your daily operations?

Purpose: To evaluate the candidate's approach to maintaining network security.

Answer: "I implement security measures such as firewalls, intrusion detection systems, and regular security audits. I also ensure that all devices have the latest firmware updates and that network access is restricted through proper authentication and authorization protocols."

Why it works: This answer highlights the candidate's proactive approach to network security, emphasizing their awareness of potential threats and mitigating methods.

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4. Describe your experience with network performance monitoring tools.

Purpose: To understand the candidate's familiarity with tools that monitor network health and performance.

Answer: "I have experience using tools like Wireshark for packet analysis, SolarWinds for network performance monitoring, and Nagios for network monitoring and alerting. These tools help me to identify performance bottlenecks and ensure optimal network operation."

Why it works: This response demonstrates the candidate's hands-on experience with essential network monitoring tools, indicating their ability to maintain network performance effectively.

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5. How do you handle network capacity planning?

Purpose: To assess the candidate's ability to anticipate and plan for network growth.

Answer: "I analyze current network usage and performance metrics to forecast future needs. I also take into account business growth projections and new application deployments. Based on this data, I develop a scalable network design and plan for necessary upgrades to avoid capacity issues."

Why it works: This answer shows that the candidate is proactive in planning for future network requirements, ensuring the network can handle growth without performance degradation.

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6. Can you explain a time when you implemented a new network design or upgrade?

Purpose: To gauge the candidate's experience with network design and implementation.

Answer: "At my last job, I led a project to upgrade our network from a traditional flat network to a segmented VLAN-based design. This work involved reconfiguring switches, updating IP addressing schemes, and ensuring minimal downtime during the transition. The result was improved network performance and security."

Why it works: This response demonstrates the candidate's practical experience with network design and ability to manage and implement network upgrades successfully.

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7. What protocols do you use for network redundancy and failover?

Purpose: To assess the candidate's knowledge of protocols that ensure network reliability.

Answer: "I use protocols such as HSRP (Hot Standby Router Protocol) and VRRP (Virtual Router Redundancy Protocol) to ensure router redundancy. For switch redundancy, I configure Spanning Tree Protocol (STP) to prevent loops and provide a failover path in case of a switch failure."

Why it works: This answer indicates that the candidate knows key protocols that enhance network reliability and minimize downtime.

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8. How do you stay current with new networking technologies and trends?

Purpose: To understand the candidate's commitment to professional development.

Answer: "I regularly attend industry conferences, participate in webinars, and subscribe to leading networking journals and blogs. I am also a member of professional organizations like IEEE and participate in online forums and user groups to stay updated with the latest developments."

Why it works: This response shows that the candidate is dedicated to continuous learning and staying informed about advancements in networking technology.

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9. Describe your experience with wireless network technologies.

Purpose: To evaluate the candidate's familiarity with wireless networking.

Answer: "I have designed and implemented wireless networks using technologies such as 802.11ac and 802.11ax. I have experience conducting site surveys, optimizing access point placement, and configuring wireless security protocols like WPA3."

Why it works: This answer highlights the candidate's practical experience with wireless networking, showing their capability to design and manage robust wireless networks.

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10. How do you handle network documentation and asset management?

Purpose: To assess the candidate's approach to maintaining network documentation and managing network assets.

Answer: "I maintain detailed network diagrams, configuration files, and asset inventories. I use tools like Microsoft Visio to create network diagrams and keep an updated inventory of all network devices in a centralized database. This work ensures that all network information is accessible and current."

Why it works: This response demonstrates the candidate's organizational skills and commitment to maintaining thorough network documentation, vital for efficient network management and troubleshooting.

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$75 hourly
Daniel R.
- 5.0
- (18 jobs)
Fisterra, GA
Network Engineering
Server
OpenVPN
Virtualization
MikroTik
Network Security
Zabbix
VoIP Administration
Proxmox VE
OpenWrt
3CX
Linux System Administration
VPN
Firewall
Asterisk
Postfix SMTP Server
VirtualBox
Linux

My tools/skills: - Linux & Opensource Solutions - Debian, Fedora, Ubuntu, CentOS etc. - MySQL, Apache, Asterisk, Postfix, OpenVPN, OpenVZ, etc. My projects: - VoIP Systems - Linux Server, Webserver, Mailserver, VoIP Server, Datenbank Server, VPN Server, File Server, Chat Server, Scripting, etc. - Virtualization - VPN Solutions - OpenWRT Router - Proxmox - OpnSense Firewalls - Ansible - AWX - Mikrotik - Zabbix - Terraform
$40 hourly
Raul M.
- 4.7
- (7 jobs)
Madrid, Spain
Network Engineering
Security Engineering
Architectural Design
Wireless Network Implementation
Wireless Security
Network Security
Network Design

Dear customers, I spent many time implementing, giving support and managing networks environments. Wireless, security, datacenter & networking. I work with many vendors like palo alto, fortinet, checkpoint, vmware, citrix, cisco, juniper, ubiquiti, Aruba... Palo Alto certified, Aruba ACCP/ACMP certified & CISCO CCNA SEC, CCNA NET, CCNP, CCIE R&S certified. Windows, Linux, MAC, android & IOS systems. Experience 10 + years !
$50 hourly
Feruz I.
- 5.0
- (8 jobs)
Prague, PRAHA
Network Engineering
Regex Writing
Docker
DevOps
VMware ESX Server
Computer Network
Cisco Certified Internetwork Expert
VMware Administration
VMware vSphere
Network Planning
Network Administration
Network Security
Network Design

As a tech-savvy DevOps and IP Architect, I specialize in virtualization, networking, and containers. I deftly turn business needs into smooth tech solutions using Docker, Kubernetes, VMWare, and various cloud services like AWS, Azure, GCP, Hetzner. I also run a premium VPN service for areas with internet restrictions and can customize VPN solutions to fit any business. Let's use technology to elevate your business!

$75 hourly
Daniel R.
- 5.0
- (18 jobs)
Fisterra, GA
Network Engineering
Server
OpenVPN
Virtualization
MikroTik
Network Security
Zabbix
VoIP Administration
Proxmox VE
OpenWrt
3CX
Linux System Administration
VPN
Firewall
Asterisk
Postfix SMTP Server
VirtualBox
Linux

My tools/skills: - Linux & Opensource Solutions - Debian, Fedora, Ubuntu, CentOS etc. - MySQL, Apache, Asterisk, Postfix, OpenVPN, OpenVZ, etc. My projects: - VoIP Systems - Linux Server, Webserver, Mailserver, VoIP Server, Datenbank Server, VPN Server, File Server, Chat Server, Scripting, etc. - Virtualization - VPN Solutions - OpenWRT Router - Proxmox - OpnSense Firewalls - Ansible - AWX - Mikrotik - Zabbix - Terraform
$40 hourly
Raul M.
- 4.7
- (7 jobs)
Madrid, Spain
Network Engineering
Security Engineering
Architectural Design
Wireless Network Implementation
Wireless Security
Network Security
Network Design

Dear customers, I spent many time implementing, giving support and managing networks environments. Wireless, security, datacenter & networking. I work with many vendors like palo alto, fortinet, checkpoint, vmware, citrix, cisco, juniper, ubiquiti, Aruba... Palo Alto certified, Aruba ACCP/ACMP certified & CISCO CCNA SEC, CCNA NET, CCNP, CCIE R&S certified. Windows, Linux, MAC, android & IOS systems. Experience 10 + years !
$50 hourly
Feruz I.
- 5.0
- (8 jobs)
Prague, PRAHA
Network Engineering
Regex Writing
Docker
DevOps
VMware ESX Server
Computer Network
Cisco Certified Internetwork Expert
VMware Administration
VMware vSphere
Network Planning
Network Administration
Network Security
Network Design

As a tech-savvy DevOps and IP Architect, I specialize in virtualization, networking, and containers. I deftly turn business needs into smooth tech solutions using Docker, Kubernetes, VMWare, and various cloud services like AWS, Azure, GCP, Hetzner. I also run a premium VPN service for areas with internet restrictions and can customize VPN solutions to fit any business. Let's use technology to elevate your business!
$100 hourly
Corwyn J.
- 5.0
- (2 jobs)
Suffolk, VA
Network Engineering
Cisco IOS
Network Planning
Network Architecture
Network Security
Network Administration
FortiGate Firewall
Fortinet
Cisco Router
Enhanced Interior Gateway Routing Protocol
Cisco Certified Network Professional
Cisco Meraki
Network Design
OSPF
Cisco ASA

Offering a solid background based on formal training, relevant certification, and 12 years progressive experience demonstrating superior personal initiative, technical expertise, performance enhancement creativity, and consistent performance success. Expert in enterprise level IT, IS, LAN/WAN/MAN networks, security, wireless systems, and complex hub and spoke platforms. Proficient in the use of a wide range of current software tools for disaster avoidance/response, systems restoration, database administration, debugging, identification of hidden or fraudulent activities, and all other faults impacting peak system performance.  Highly reliable, industrious, productive, and versatile team player and employer asset with a broad range of core competencies developed from multifaceted training and experience in enterprise IT setup and support, leadership/project management, advanced helpdesk services, hardware/software configuration, network administration, and communication/link engineering. CORE COMPETENCIES • Seasoned IT and Telecom Technical Professional • Full Scope LAN / WAN / MAN Oversight and Administration • Internet / Intranet Configuration – System Tests / Patches • Hardware/Software Maintenance – Enterprise Backups • IT Asset Inventory Management / Licenses • Research, Procurement, Technology Upgrades Implementation • Cutting Edge Cyber Security / Vulnerability Management • Strategic Planning / Enterprise IT Analysis / Change Management • Enterprise Network Design, Architecture, Footprint • Policy Writing / User Manuals / Training Programs • 11+ Years in Cloud and Data Center Networking • Customer Service / Account Management / Problem Solving • Data & PII Integrity / Firewalls / Wireless Access • Maintenance / Vendor Relations / Contract Management • Public Relations / Community Advocacy / Branding • Program Administration / Summary Reporting / Presentations OPERATING Windows (XP/Vista/7/8/10/11); Mac OS / OSX; Cisco IOS (12.0 / 15.2). SYSTEMS: Aruba Operating System (AOS) 3.4.5.1 – 6.3.1.9 NETWORKING WINS/DNS/DHCP; BGP, RIP, EIGRP, OSPF, VPLS, VDC, VPC, MPLS, STP, RSTP, VLAN, NAT/PAT Gateway Redundancy Protocols (HSRP, VRRP, and GLRP), OTV Fortinet SD-WAN TOOLS: ServiceNow, Protocol Management; Ports and Services Utilization HARDWARE: Cisco Switches: 2950, 2960, 2960S, 2960X, 3650X, 3750G, 3750X, 3850, 9200, 4506e, 4507re, 6509-E Cisco Nexus: 9k,7k, 5k, MDS Cisco Routers: 1841, 2801, 2811, 2901, 2921, ISR 4221, 4321,4331,4431,4451, ASR 1001-X. Cisco Firewalls: ASA 5505, 5520, 5545X & Firepower-2110 Cisco WLC & AP: 2504, 5508 1242, 1252, & 1260 Cisco ISE experience Meraki Switches: MS220 & MS320; Meraki Access Points: MR26, MR34, MR42, & MR66 FortiGate Firewalls: 60D, 60E (Wi-Fi), 100D, 200D 600E Meraki Firewall: MX80; Other Firewalls: Palo Alto Aruba Wireless Controllers: 7220 & 6000M3; Aruba Access Point models 105,124, 125. SOFTWARE: Microsoft Word/Excel/Outlook/PowerPoint/OneNote/Teams/Visio; MS Project; Symantec Firewall. Mozilla Firefox; CA Spectrum Solar Winds/ORION; Super PuTTY; TFTP Server; Airwave Wireless Network Monitoring; Remedy Ticket System; Triole Ticket System; Logmein123.com Remote Support. Nagios; Sprint Encompass (MPLS); Ekahau (Wireless Site Survey); ExtraHop, ServiceNow, GitHub LINKING LAN/WAN/MAN Communications; AWMS Wireless Management System; Aruba 7220, 6000, and 3200 & TELECOM Wireless Controllers; Access Point Models (105 / 124 / 125) T1 and T3 Technologies ECPI UNIVERSITY (formerly: ECPI College of Technology) - Virginia Beach, Virginia Bachelor of Science in Electronics Engineering Technology, Minor in Wireless Systems (2011) CISCO Certified: Network Associate / Network Professional / Enterprise Core / Enterprise Advanced Infrastructure Implementation • Microsoft Certified: Azure Network Engineer Associate
$40 hourly
Arvin A.
- 4.9
- (8 jobs)
Kabankalan City, NEGROS OCCIDENTAL
Network Engineering
Wireless Communication
Ubiquiti
System Administration
Internet Security
Wireless Network Implementation
Wireless Security
Server Virtualization
Network Design
Information Technology Operations
Computer Network
MikroTik RouterOS
Network Security

Certified Mikrotik Consultant Certificates: MTCNA, MTCRE, MTCUME FIELD EXPERTISE: Data Center Deployments Networking: BGP, OSPF, Switching, VLAN Network Design Network and System Monitoring Security: Mikrotik, Ubiquiti/Unifi, pfSense Virtualization: Proxmox, VMWare ESXi Cloud: AWS, GGC Platform Experienced in Fiber Optics Programming language: HTML, PHP, JS, CSS Wireless: Ubiquiti, Mikrotik, Cambium CERTIFICATIONS: MTCNA, MTCRE, MTCUME Working with Mikrotik and Ubiquiti platforms since 2017 and can handle Mikrotik, Cisco, Juniper platforms for ISP production and security.
$90 hourly
Travis Y.
- 5.0
- (3 jobs)
Plainview, NY
Network Engineering
User Experience
.NET Core
Software Architecture & Design
Software Integration
Full-Text Search
Microsoft Azure
Vue.js
Node.js

I represent twenty plus years of bumper to bumper software engineering within multiple verticals, environments, and technologies. In my extensively stocked utility belt are myriad successful projects ranging from robotics to mobile development. I craft solutions pragmatically, insuring a durable durable product and a successful outcome. I am an expert UX designer, having worked in advertising and publishing, so it will look good. I pride myself on providing a highly usable interface and can tailor this along whatever guidelines provided. I am equally adept in crafting back-end solutions on most major platforms. I can support or expand a wide range of open-source and proprietary solutions, or craft custom to fit your needs. I have worked extensively with service based architecture, and construction always takes growth into consideration. Scalability is key, and I welcome expanded scope. I can access, if need be, an extended network of colleagues all of whom I have worked with personally, likeminded in terms of quality and dedication. How work according to a tried and true formula. 1. Outline the detail and scope of the project. 2. Establish our workflow, with an emphasis on open communication. 3. Dissect the project per logical unit. 4. For each unit: ... Produce deliverable. ... Subject to automated and acceptance testing. ... Submit for approval, refining as we go. ... Upon approval continue 5. Deliver the final. 6. Documentation if indicated 7. A period of refinement and support, typically a good will effort. This system establishes a pace that is both evident and finite, and produces well defined boundaries, with well defined deliverables, but leaving room to grow. All work is completed on deadline to client satisfaction.
$75 hourly
Payton G.
- 5.0
- (13 jobs)
Adelphi, MD
Network Engineering
VoIP
Network Design
AWS Systems Manager
Network Security
AWS Lambda
AWS CodeDeploy
System Security
Penetration Testing
Vulnerability Assessment
Customer Service
Network Administration
Technical Support
Data Entry
VoIP Administration

I currently work freelance projects. I used to work for Vonage Business (VoIP service provider) as a VoIP Engineer and had been provisioning, troubleshooting, and maintaining VoIP services and networks for 7 years. I am also a Certified Ethical Hacker (CEH) through International Electronic Commerce Council. Certified Ethical Hacker (CEH) is a qualification obtained by demonstrating knowledge of assessing the security of computer systems by looking for weaknesses and vulnerabilities in target systems, using the same knowledge and tools as a malicious hacker, but in a lawful and legitimate manner to assess the security posture of a target system. Hacking websites and discovering security vulnerabilities along with recommending remediation is my specialty. If your business is online, it is your business to ensure that it is secure.
$80 hourly
Kevin H.
- 4.5
- (12 jobs)
Union, MO
Network Engineering
Web Application
Information Security
Network Security
Web Server
Web Design
API Development
Website Redesign
SQL
PHP
JavaScript
Python
Web Service
API

I am a web and software developer with over 10 years of experience working in multiple programming languages and frameworks. I specialize in responsive and reactive applications that are both functional and appeasing to the eye. I focus on futureproofing your app by planning for scalability both in size of the customer-base and infrastructure changes needed in the future.
$125 hourly
Florian S.
- 5.0
- (6 jobs)
Berlin, BE
Network Engineering
Web Service
cPanel
Business Consulting
Social Media Strategy
Startup Consulting
Hardware Troubleshooting
IT Management
Network Administration
Web Development

Hi all, my name is Florian I’m a German born, English speaking IT specialist currently based in Western Australia. My main area of focus is working together with entrepreneurs and small businesses to improve and streamline their workflows and processes. I can be an asset for anyone seeking an IT savvy and enthusiastic external source of expertise. My recent work history includes but is not limited to: Network Administration for one of Germany's largest TV Channels Starting a New Zealand based hospitality & online business Project Manager in rural Western Australia for shareholder financed investment projects. Farm Network - infrastructure & IT Solutions Startup of a small business called kaarnasauna.com- a mobile Finnish wood fired Sauna in Margaret River W.A + Fully automated public Sauna in a converted 20ft sea container (to be released '24) Currently working for mainly Australia based clients.
$50 hourly
Febrianto F.
- 5.0
- (2 jobs)
Tangerang, BT
Network Engineering
Regex Writing
Splunk
Cybersecurity Tool
Palo Alto Firewalls

I have been working on security engineer field for almost 7 years. Have knowledge on configure security rule, NAT rule, PBF rule, IPSec, and GlobalProtect (Palo Alto VPN). Able to identify network / firewall related issues as I am able to see a big picture of a traffic flow. I have experience on several firewall technology ( Palo Alto, Checkpoint, Forcepoint, and Juniper ). Below is the list of certificate I have: 1. PCNSA 2. PCNSE 3. PCNSC 4. PSE Pro SASE 5. PSE Pro Cortex
$50 hourly
Driss J.
- 5.0
- (77 jobs)
Rabat, RABAT-SALÉ-KÉNITRA
Network Engineering
Cybersecurity Management
Automation
Network Architecture
Intrusion Detection System
VPN
Firewall
Network Security
F5, Inc.
FortiGate Firewall
Cisco Certified Network Professional
Cisco ACI
Microsoft Azure
System Administration
Virtualization

When your business faces network bottlenecks, security vulnerabilities, or system inefficiencies, you need more than just technical knowledge you need actionable solutions that protect and enhance your operations. Working with me means gaining a partner who transforms complex networking and security challenges into opportunities for improvement. My approach focuses on your specific business needs: - Your cloud migration will be secure and optimized, whether using AWS or Azure, preventing costly disruptions and data exposure - Your network performance issues will be diagnosed and resolved, eliminating frustrating downtime that impacts your bottom line - Your security posture will be strengthened with properly configured firewalls, VPNs, and intrusion prevention systems With 8+ years handling enterprise-level projects across Cisco, Palo Alto, and Fortinet environments, I bring practical solutions rather than theoretical knowledge. My background includes advanced certifications (CCNP, NSE7, AWS Solutions Architect, CEH) that translate into real capabilities for your organization. Your project deserves someone who communicates clearly throughout the process and delivers measurable results. Let's discuss how I can help your business overcome its current networking challenges while building a more resilient infrastructure for the future.
$75 hourly
Paul S.
- 5.0
- (8 jobs)
Aguanga, CA
Network Engineering
Microsoft PowerApps
Network Planning
Microsoft SharePoint Development
Microsoft SharePoint Designer
Business Management
Microsoft Power Automate
pandas

Power Platform and SharePoint Power Platform developer with experience in both Canvas and Model Driven application development to include mobile application development. Power Automate flow development using standard connectors in addition to creating custom connectors if the situation warrants. If you are not already using the MS ALM to manage both PowerApps and Power Automate I’ll encourage you to do so. PowerShell custom scripting development for Microsoft including SharePoint and administration as required. PowerShell is one of my favorite tools. If you are branding your SharePoint site and want standard customized site pages (aka site designs) this is the best tool to make that happen. I really enjoy working on SharePoint and the Power Platform and I can help make your business more efficient with these tools.
$185 hourly
James T.
- 5.0
- (90 jobs)
Amarillo, TX
Network Engineering
Docker
Email Design
Network Administration
Network Monitoring
Network Design
Linux System Administration
Network Security
Network Planning
Web Hosting
Windows Administration
Virtualization
System Administration
System Monitoring
NGINX

Hey, I'm James. I've been a self-employed business network and server admin for 25+ years. I've worked with all flavors of Linux and Windows for some of the best businesses in the country. My average customer that I've worked with has been with me over 15 years. I specialize in analyzing current infrastructure and determining the needs of my clients then providing a written plan to correct any issues and protect the business systems from hackers and cryptolockers. In one of my recent projects, I consulted with a six billion dollar, publicly traded company to completely redesign their infrastructure to have redundant firewalls, VMWare host servers, leased fiber lines directly to Amazon AWS with a VPN backup over a regular Internet circuit that would automatically fail over in case of any circuit issue. The vmware servers would auto migrate the guests in the case of overload or host server failure. All power systems were redundant with two powersupplies for each piece of equipment. At the end of this project, we had reduced their monthly cost of management by over 25,000 per month and reduced their server load from over 20 servers to just 8 servers. When you hire me, here's what you can expect: 1. First, click the invite button to invite me to your job. 2. Once everything is accepted, I'll jump on the phone or a zoom with you 3. We'll go over the details of the job and I'll ask questions to drill down to the specific goals you want to accomplish. 4. I'll provide you with a high level written plan to address your goals along with expected time needed to complete your project. 5. When we agree on the timeline and process, I will execute the plan. So, if this sounds good, just click the "invite" button and we can start.
$40 hourly
Cristian Javier F.
- 5.0
- (7 jobs)
Buenos Aires, BUENOS AIRES F.D.
Network Engineering
Information Security Audit
Application Security
Cloud Security
Security Assessment & Testing
Security Management
Network Design
Fortinet
Load Balancing
DNS
Check Point
F5, Inc.
Network Administration
Network Security
Firewall

🔹 Profile Overview I’m a seasoned Cybersecurity Engineer and Architect with over 10 years of experience securing networks, applications, and identities for companies across industries, particularly fintech, SaaS, and cloud-native environments. I specialize in designing and implementing end-to-end security architectures, combining technologies like F5, Fortinet, Check Point, CrowdStrike, Auth0, and JumpCloud. I integrate this stack with automated controls, threat detection workflows, and identity governance, always aligned with standards such as PCI-DSS 4.0. I bring not just execution, but also strategy and enablement often training teams and building long-term operational capabilities in the organizations I work with. 🔹 What I Do Best 📌 Network & Application Security Architecture - Secure network zoning, DMZ design, Zero Trust network segmentation - LTM, APM, ASM, GTM, and SSL Orchestration with F5 BIG-IP (iSeries, Viprion, Velos) - UTM firewall configuration and policy enforcement (FortiGate, Check Point, Palo Alto) - Application security: WAFs, RASP, SAST, DAST, API protection - Secure routing protocols (BGP, OSPF, EIGRP), VPN tunnels, SSL VPN 📌 IAM & CIAM Solutions - Onboarding/offboarding automation (JumpCloud, Google Workspace, Auth0) - Role-based access control, least privilege enforcement, policy-as-code - SSO integration (OIDC, SAML), MFA, passwordless and adaptive authentication - Customer Identity flows: secure login, anomaly detection, fraud prevention - Lifecycle management & periodic access reviews with audit logs 📌 Security Automation & Engineering - Python scripting for user auditing, alert enrichment, threat detection - SOAR workflows: auto-ticketing, playbook execution, alert suppression - Slack/Jira/Zapier integration for incident and compliance automation - API-based enforcement for identity, endpoint, and access controls 📌 Blue Team & Threat Detection - Sentinel SIEM design, rule tuning, UEBA, and automated playbooks - CrowdStrike and ESET deployment, policy enforcement, health monitoring - Threat intelligence: IOC ingestion, enrichment, and correlation - Crisis simulations, response workflows, forensic analysis 📌 Compliance & Audit Readiness - PCI-DSS 4.0 technical control design and evidence generation - Security documentation, IR plans, risk registers, access policies - Data retention, logging, and monitoring mapped to regulatory requirements 📌 Training & Enablement - Instructor of advanced cybersecurity courses (F5, Check Point, Fortinet, IAM, WAFs) - Workshop development and hands-on simulation labs - Documentation and knowledge transfer included in all deliverables 🔹 Certifications 📌 F5 Certified Administrator (F5-CA) 📌 F5-CST – LTM, APM, DNS 📌 Check Point Certified Security Administrator (CCSA R80)
$50 hourly
Bobby V.
- 5.0
- (36 jobs)
New Addington, ENGLAND
Network Engineering
DevOps
Linux System Administration
DNS
Automation
Cisco Certified Network Professional
Microsoft Azure
Network Design
Linux
Windows Administration
Software-Defined Networking
Python
Network Security
Firewall

Senior Infrastructure Engineer with 10+ years building and scaling resilient network infrastructure from bare-metal racks to hybrid clouds. I design and deploy high-performance systems that stay online, stay secure, and stay lean. Battle-tested across enterprise, data center, and cloud environments. Experienced in multivendor ecosystems, including Cisco, Arista, Palo Alto, Fortinet, VMware, OpenStack, and AWS, with a strong focus on uptime, smart automation, and eliminating unnecessary complexity. Currently leading global deployments of Equinix’s Network Edge platform. Automating with Python, YAML, and Git to deliver efficient, secure, and fit-for-purpose infrastructure at scale. 💻Tech Skills💻 ✅Programming: Python, APIs(RESTful, NETCONF, RESTCONF), XML, JSON, YAML, YANG, Ansible ✅OS: Windows Server(PowerShell, AD, Group Policy, Exchange), Linux(Bash, IPtables, Permissions, Nginx), macOS, Cisco IOS, Cisco NX-OS, Dell OS10, Arista EOS ✅Networking: WAN, LAN, WLAN(Meraki, UniFi), VLANs, VXLANs, IPv6, NAT, RIP, OSPF, BGP, VRF, ACLs, QoS, VPNs, DHCP, DNS, SAN, NFV ✅Security: Firewalls(Palo Alto, FortiGate, SonicWall), CASB(Netskope), SIEM(Rapid7), MDM(MaaS360), IAM(Okta, Centrify, CyberArk), Email(Mimecast) ✅Virtualization: VMware, Hyper-V, KVM, Proxmox ✅Cloud: OpenStack, AWS(EC2, VPC, S3, IAM, WorkSpaces), Azure(VMs, AD, Networking), Google Workspace, Office 365 ✅Tools: Git, Postman, ManageEngine, Dell OpenManage, Dell iDRAC, Cisco CIMC, Wireshark, Nmap, PRTG, Zabbix, Observium, Graylog, Veeam, Passbolt, NetBox, Itemit, Visio
$125 hourly
Matthew T.
- 5.0
- (9 jobs)
Centreville, VA
Network Engineering
Cisco
Web Proxy
VPN
Fortinet
Firewall
Palo Alto Firewalls
Ubiquiti
Network Security
Data Center Operations
Data Center Migration
Data Center Design
Network Design
Ubuntu
Windows Server

• IT professional with 15+ years of experience in network and systems administration. • 7+ Years supporting small business clients. Primary Areas of Expertise: • Network Engineering (Routing, Switching) • Network Security (Firewall, VPN, WAF, Proxy, SSL Inspection) • Systems Administration (VMWare, Windows Server, Linux) • Data Center Management (Account management, Vendor Management, Smart Hands) • Public Cloud ( AWS, Azure, GCP) • In-depth knowledge of network and server infrastructure, virtualization, public cloud, audit and security best practices, vulnerability management, project planning, design, pricing and budgets. • Experience working in large, complex, highly available environments. • Experience supporting small business.
$45 hourly
Hector Q.
- 5.0
- (9 jobs)
Monterrey, NUEVO LEON
Network Engineering
Azure DevOps
AWS Server Migration
Kubernetes
Server
DevOps
Solution Architecture
Network Administration
Information Security
Linux

Experienced IT professional with 10+ years of experience in multinational companies. Skilled in on- premises and cloud infrastructure, DevOps, security, and unified communications. Strong focus on security and cloud-based platforms like AWS and Azure. Expertise in implementing continuous integration and deployment (CI/CD). Knowledgeable in containerization technologies such as Docker and Kubernetes.
$50 hourly
Venkatesh C.
- 5.0
- (12 jobs)
Bangalore, KARNATAKA
Network Engineering
SNMP
Computer Network
Wireshark
Iptables
Cisco Router
C
Socket Programming
Kernel
Network Software
Network Administration
Linux System Administration
OpenVPN
Ansible
Linux

I specialize in writing Network Automation Infrastructure code, Network applications and System software for Linux and "Unix-like" OS's. The tools of my trade are Ansible, Python, C and C++. My Perl and shell-scripting skills aren't too bad either. I worked for more than 18 years at Cisco Systems, where I wrote software applications for IOS and IOS-XE switches and routers. In the process, I developed a deep understanding of how packets move, and about the boxes that make packets move. Outside of Networking, my areas of expertise include Linux and Embedded systems. I have hands-on experience with OpenStack and Docker. I have an understanding of Cloud Networking in the context of OpenStack Neutron. I possess decent writing skills, and a couple of my technical articles on the web register a few dozen hits every day. I take pains to document my work and explain them to my clients. I have received feedback telling me that I should have been a teacher. I have the ability to explain whatever I know in a clear manner free of jargon. I have 25+ years' overall experience in the software industry as a hands-on programmer. I've never been a people manager: all I've done for 25+ years is write, test, debug, deploy and support code. People familiar with my working style would describe me as "careful, methodical, systematic and logical" rather than "brilliant", "flamboyant" or "genius". Portfolio: ********** I divide my time between building solutions for my clients, creating open-source projects and writing the occasional article on programming network applications. My client projects include: - a set of Ansible playbooks (about 300 tasks in all) to install and configure an OpenStack instance on a single computer. The playbooks were embedded inside a Docker container, and running the container would start the ansible-playbook runs. The use-case was an IoT Edge installation, where the OpenStack instance would house VMs to run analytics on data coming from sensors. - an Ansible playbook to deploy and configure VyOS routers in an VmWare ESXi environment. Involved creating the router instances, creating VRFs and other related configuration. - a "domain name catcher" for Nominet in C: the work involved studying packet capture (PCAP) files using Python, running analysis using NumPy and matplotlib on the packet data, and using the insights thus obtained to tweak the behaviour of the C program. - use of profiling techniques to dramatically improve the performance of a C++ desktop network application: my client had a program that would scale poorly as the number of network hosts increased, which I was able to fix after studying the profiling results and reworking the data structures used in the program - a Perl interface to access Google Analytics - post-parsers in Python to process Google Vision API JSON outputs I am the author of several open-source projects, including: - an Ansible role that configures AAA, Layer-2, Layer-3, QoS and Netflow on a Cisco Catalyst switch. This makes extensive use of Jinja2 templates to generate the IOS configuration based on variables stored in YAML - a lookup plugin for Ansible that expands strings of the form "Gi3/1-4,Gi4/1-4" and generates a list of full individual interface names. This is extremely handy when writing Network Automation playbooks, for applying a configuration on a set of interfaces. - a Python PCAP to CSV converter (extracts fields from a PCAP file and populates the rows of a CSV document) - a Network Automation demo repository, where I have code to perform a particular network configuration task (creating a VLAN, its associated Layer 3 interfaces, IPv4 subnets and OSPF networks) using multiple approaches: Python (using the netmiko module), NETCONF/YANG, Chef, Puppet and Ansible I have a couple of fairly popular technical articles online: an article on Network Automation using various approaches, and one on using Python programming techniques to analyze packet capture (PCAP) files. Some examples of what I can do for you: ********************************************** - write/test/debug/deploy network automation code (Ansible playbooks, Python scripts etc.) - write/test/debug/deploy network applications, tools and utility scripts (in C, C++ and Python - Perl and bash/Bourne shell as well) - use standard GNU tools like gcc, gdb, gprof, gcov and make to build system software in C and C++ - create technical articles, blog posts, training material etc. on Networking and Network Automation - port open-source C/C++ projects to your platform
$90 hourly
Mohammad Z.
- 5.0
- (5 jobs)
Falls Church, VA
Network Engineering
Cisco Prime
Technical Support
Network Security
Microsoft SharePoint
Amazon ECS
Cisco Certified Network Associate
Microsoft SharePoint Administration
Cisco Certified Design Associate
VPN
Incident Management
Cisco ISE
Microsoft Office

I am a highly skilled and certified IT expert with industry certifications and years of experience with AWS, Cisco Networking, Microsoft and Sharepoint Online, Azure, VMware/vCenter and an array of other systems. I have worked on numerous project both small and large scale and have proven success in these projects. I am looking to expand my portfolio and help your business succeed! Certifications: CCNP, CCNA Security, CCDA, CCNA, AWS Solutions Architect Systems experience: Cisco Nexus, Cisco Catalyst, Cisco FirePower and ASA, Fortinet and Fortigate appliances, Ubiquiti, Meraki, Dell Servers, Microsoft Server, ESXi, VMware/vCenter Major Projects: Senior Systems Engineer (DoD): - Managed Data Center system that included the following technologies: - Dell Servers running ESXi - VMware/vCenter - Microsoft Server 2019 and SharePoint Server 2019 - Cisco Nexus switches - Cisco FirePower running ASA - Worked with stakeholders to create Release Pipeline and cultivate an environment to develop new and improved technologies to the environment to improve customer satisfaction - Automated tasks/deployments of new features using powershell, bash, and ansible SharePoint environment (DKT Solutions LLC): - Migrated company from Google Workspace to MSOffice 365 and utilized Power Automate to create workflows for task automation - Spearheaded SharePoint Online sites and utilized Office 365 tools to help transition to a remote work environment for users during COVID pandemic Core Upgrade/Migration (Department of Justice): - Designed and implemented outline for new core upgrade including migrating network from single 6509 core switch to dual 9606r Catalyst switch in StackWise Virtual bundle IT Infrastructure set up (1,000+ devices) - Inova Women's and Children's Hospital: - Lead team of technicians installing over 5000 new network devices to network infrastructure in new Women and Children's Hospital Network refresh project (100,000+ network devices) - Inova Medical System (All sites): - Migrated over 200 IT network closets and 100,000+ devices to new enterprise network which included ensuring all devices were authenticated using Cisco ISE and verifying functionality of all devices post-migration - Designed and implemented new IP scheme for large scale environment Network set up for new office (100 devices) - Buchanan & Edwards: - Maintained SharePoint Online environment for company with 300+ users. - Spearheaded creation of workflows to automate tasks such as data entry, new hire process and fun tasks such as birthday emails and anniversaries - Designed and implemented plan to set up network infrastructure in new office in Quantico for 60 end-users and included 120 networked devices including creating a VPN tunnel over the internet to connect multiple remote sites Wireless upgrade (25 devices) - Buchanan & Edwards: - Designed wireless upgrade plan including implementation of new WLC's and new WAP's to optimize wireless performance in headquarters
$55 hourly
Babken M.
- 5.0
- (2 jobs)
Burbank, CA
Network Engineering
OSPF
Cisco Certified Network Professional
Cisco Router
Network Security
Cisco ASA
VPN

Experienced OT Cybersecurity consultant with a strong background in Industrial Control Systems (ICS) and Operational Technology (OT) security. Possess over 7 years of experience in assessing, designing and implementing security solutions for critical infrastructure and manufacturing environments. In-depth understanding of ICS protocols and OT networks, as well as industry standards such as NIST SP 800-82 and ISA/IEC 62443. Adept at bridging the gap between technical and non-technical stakeholders, ensuring that security solutions are aligned with business needs. Proven ability to lead teams, drive projects forward and deliver results under tight deadlines.
$45 hourly
Chynnon Caesar D.
- 4.8
- (3 jobs)
Makati City, METRO MANILA
Network Engineering
Technical Support
Information & Communications Technology
Network Monitoring
Network Administration
Email Support

Currently working as a Senior Network Engineer at Commverge Solutions Ph, INC. • Commissioned 17 MX960 Juniper Routers for the IPOE CGNAT Hardware Upgrade Project, for the additional capacity of the client's Broadband network services. • Commissioned 20 MX960 Juniper Routers for the BNG/CGNAT Hardware Upgrade project, ensuring they meet the necessary performance and reliability requirements. • Acted as an SME for Globe's APN DNS, IMS DNS, BNG/CGNAT, and IPOE CGNAT while being involved in continuous support activities and relationships with customers and vendors ensuring the delivery of support according to the service level agreement. • Participated in project development work for Network and System infrastructure business solutions • Manage and implement the project setup of the customer service request. • Create and implement test plans and acceptance procedures. • Understanding the product/offer value proposition and ability to operationalize it for customers and customer teams. • Carry out maintenance, troubleshooting activities, analysis, and calibration of test systems, fixtures, equipment, and software. • Manage and support tickets of customer-related issues regarding their subscriber accounts and plans • Troubleshoot raised tickets issued by the client regarding traffic degradation, DDoS attack, and alarms generated on the edge routers of the client
$150 hourly
Landon D F.
- 4.8
- (15 jobs)
North Richland Hills, TX
Network Engineering
Articulate Rise
Articulate
Articulate Storyline
Article Writing
Tech & IT
Blog Content
Cisco Meraki
Content Writing
Network Administration
Network Design
Network Analysis
Wireless Network Implementation
WiFi
Wireless Communication

Certified Wireless Network Expert #317 and the world's first Certified Wireless IoT Solutions Expert, Landon Foster is a Wireless Engineering consultant proficient in IoT implementation and Enterprise 802.11 Networks. An Outstandingly curious individual, he always is seeking to learn more and writing about what he learns. Co-Author of CWAP-403, CWICP and several industry standards, he is an active part of the community and engages in mentoring at every opportunity. He also enjoys teaching, and actively offers a scholarship for young engineers to take their first cert at a minimum of one individual every quarter. He is a Former Marine and lives in Fort Worth, Texas with his two sons and wife.
$110 hourly
Timothy I.
- 5.0
- (62 jobs)
Meadows Place, TX
Network Engineering
Cisco Router
Cloudflare
Linux System Administration
OpenVPN
Amazon GuardDuty
Oracle Cloud
Bash Programming
Firewall
Amazon Web Services
Python
Cisco Meraki
Ubiquiti
Virtualization
VPN

Experienced network engineer that has embraced the cloud and helped organizations large and small. I have done everything from establish VPNs to design global hybrid networks that utilize SD-WAN and direct connect. I have also designed multi-account AWS environments with least privilege cross account access via IAM users and SAML identity providers. I hold over 10 AWS certifications including Solutions Architect Professional, Advanced Networking Specialty, and Security Specialty. I am passionate about learning new things, expanding my existing knowledge, and sharing my knowledge to help others effectively utilize technology.
$70 hourly
Svyatoslav B.
- 4.7
- (7 jobs)
Fredericton, NB
Network Engineering
FreeSWITCH
OpenSIPS
VoIP Software
Red Hat Enterprise Linux
Linux System Administration
Network Administration
System Administration
VPN
VoIP
Network Design

NetworkLab, is experts in Linux based Open Source Projects includes firewalls UTM and many others. Fortinet Mikrotik Cisco PFsense EndianUTM Libreswan Strongswan Asterisk (FreePBX, MirtaPBX) Freeswitch (FusionPBX) XMPP (Ejabberd, Prosody) Opensips Kamailio Theforeman Katello Nagios Check-mk Linux VPN infrastructure ( Libreswan, Strongswan) Ovirt Libvirt Archipel We are proven source of professionals in technology industry. Our full-service help build the tools you need for a successful product.
$45 hourly
Alaeddine H.
- 5.0
- (25 jobs)
Ariana, ARIANA
Network Engineering
OpenSIPS
FreePBX
PostgreSQL
Wireshark
Asterisk
Session Initiation Protocol
Kamailio
Vtiger
Iptables
MySQL
Bash Programming
PHP
Linux
VoIP

My experience in the VOIP domain has been for 15 years. My customer satisfaction is my goal. I have extensive experience with Asterisk/Kamailio systems, as well as Linux and network administration. I have the ability to do advanced troubleshooting . My expertise on this: * Asterisk, Kamailio, OpenSips, FreePBX, A2billing, SIP, H323, IAX, Webrtc, hylafax, Asterisk-Pannel, iaxmodem, rtpproxy, MediaProxy, WebRTC, SipML5, SMS API, IVR (Interactive Voice Record),Wireshark * IP routing, router configuration (cisco, iptables routing), switch, Vlan, VPN (Ipsec linux, cisco vpn, fortigate, OpenFire). * Fail2ban, Iptables, OpenSwan, Squid, Cisco FirePower, Vmware, Proxmox * Php, Mysql, Postgresql, sqlite, Mongodb, Bash , LUA , Java, AGI, AMI * Roundcube, Zimbra, Zabbix, Smokeping, munin, Nagios, Cisco NetFlow, Voipmonitor * Git, Ansible, bitbuket, atlassian My time is my value. So when you choosing me you can expect that job will be done in short terms and perfect. I don't like to do something that not need be done. @linkedin linkedincom/in/alaeddine-hertelli/ SKYP:alasupcom1
$65 hourly
Michael G.
- 5.0
- (3 jobs)
Atlanta, GA
Network Engineering
Fortinet
Network Planning
Network Design
Cloud Architecture
Microsoft Azure
Cisco Certified Network Professional
Solution Architecture
Project Planning
Network Administration
Cisco Certified Design Professional
Cisco Router
Cisco Meraki

Outstanding capability to take the initiative; highly motivated; ability to interact with all levels of company personnel; previously awarded for my involvement in highly visible projects as lead engineer; ability to work in a fast paced environment; good oral and written skills; effective team player; excellent proofreading and editing skills; 15+ years of professional experience in the information technology industry; proven ability to learn quickly and become proficient in new products and technology; dependable and detail oriented; effective technical troubleshooting knowledge.
$80 hourly
Sri A.
- 5.0
- (12 jobs)
Los Angeles, CA
Network Engineering
Office 365
Risk Assessment
Microsoft Active Directory
Microsoft Azure
Virtual Desktop Infrastructure
Systems Engineering
ISO 27001
Vulnerability Assessment
Cybersecurity Management
Network Design

Cybersecurity: CMMC Consultation, Gap Analysis, Mock Assessment, and technical implementation. Lead CCA (CMMC Certified Assessor) CCP (CMMC Certified Professional) Cybersecurity consultant with 20+ years of experience and several certifications including CISSP, CISM, CISA, CEH, ISO 27001 Lead Auditor, CNDA, and Security+. Expert in NIST Cyber Security Framework. Ability to guide companies thru 800-171, FARS, DFARS, FedRAMP, CMMC, and NIST 800-53 Compliance. Helping Federal Government subcontractors compliance with Information Assurance requirements (SSP, POAM, etc.,) Able to assess any Cybersecurity related compliance and shortcomings. GRC (Governance, Risk, and Compliance) - Worked with CISOs guiding their organizations through GRC Network Security: Network Architect, Network Engineering, formally CCSP and CCNA certified. Conversant with major Routing, Switching, and Firewall equipment in the market. Software Development: Web Application Security Vulnerability Analysis, Secure SW development processes, SW Assurance, and SW development best practices
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