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Ahmed M.

Alexandria, Egypt

$25/hr
5.0
28 jobs

👨‍💻 Experienced IT Lead | Cloud & DevOps | Infrastructure & Security Specialist With over 10 years of hands-on experience in cloud solutions, DevOps automation, and network infrastructure, I design and maintain reliable IT environments for multi-branch organizations. Skilled in Azure, AWS, DigitalOcean, Hetzner, Contabo, Vultr, Bluehost, and Hostinger, managing migration, integration, and automation between on-premises and cloud systems. Proficient with Docker, GitHub, CI/CD pipelines, API integration, and scripting in Python, PowerShell, and Bash to streamline deployments and automate operations. Experienced with VMware ESXi, Proxmox, and Windows Server (2012–2025) administration, including Active Directory, Group Policy, DNS, and DHCP. 📜 Certifications: ✔ 📘 ITIL® 4 Foundation Certificate in IT Service Management ✔ 🎓 CCNA Routing & Switching (Cisco Certified Network Associate) ✔ 🏆 MCSA Windows Server 2012 (Microsoft Certified Solutions Associate) ✔ 🏅 MCSE Core Infrastructure (Microsoft Certified Solutions Expert) ✔ 📡 Cisco Certified Specialist - Enterprise Core ✔ 🔐 Cyber Security Foundation (CSFPC) ✔ 🖥 Microsoft Certified Professional (MCP) 🛡 Network & Security Expert in firewalls (Sophos, pfSense, OPNsense, Mikrotik, DrayTek), VPNs (IPSec, WireGuard, SSL), and Cloudflare DNS/SSL security. Skilled in routing, VLANs, QoS, load balancing, and network monitoring for high-availability connectivity. 🏗 Systems & Virtualization Managing both Windows and Linux servers (Ubuntu, CentOS, Debian) with RAID, NAS/SAN, and backup solutions like Veeam. Experience in Proxmox VE, VMware, and Hyper-V environments. 📞 VoIP & Communication Administering Avaya, Asterisk, FreePBX, and Issabel systems, configuring SIP trunks, IVR, queues, and call recording for enterprise call centers. 🏢 ERP, CRM & Business Systems Managing Odoo, custom ERP deployments, and CRM integration to improve business workflow and data consistency. ☁ Remote & IT Management Using AnyDesk, Zoom, TeamViewer, and ManageEngine for remote support, monitoring, and ticketing. Experienced in IT procurement, inventory tracking, and documentation. 🎥 CCTV & Access Control Installing and maintaining IP/Analog CCTV, access control, and UPS power systems for secure and reliable infrastructure. 🚀 Passionate about cloud infrastructure, automation, and cybersecurity, with a proven record of optimizing enterprise networks and ensuring system uptime, stability, and security.

  • Network Administration
  • DHCP
  • Linux
  • Server
  • VPN
  • Cloud Services
  • Ecommerce Website
  • VoIP
  • Firewall
  • Proxmox VE
  • Server Virtualization
  • Systems Engineering
  • DNS
Flavio Y.

Brighton, United Kingdom

$65/hr
5.0
11 jobs

🔹SENIOR NETWORK ENGINEER | NETWORK SECURITY, PRIVATE CLOUD & INFRASTRUCTURE🔹 Senior Network Engineer with 6+ years of experience designing, securing, and operating enterprise networks, private clouds, and IT infrastructure. I've built private clouds for clients of a global managed hosting provider with presence in 10+ data centers and over 2 Pbps of global uplink capacity, and delivered network and security solutions across a wide range of enterprise environments. Whether you're designing new infrastructure from scratch, upgrading and modernizing an existing network, hardening your security posture, or migrating workloads to the cloud, I bring senior-level engineering with a focus on clean design, security, and long-term reliability. 🌐 Network Engineering & Design Enterprise, data center, and multi-site network design and upgrades. Routing: BGP, OSPF, EIGRP, IS-IS, MPLS, VXLAN Switching: VLANs, STP, LACP, MLAG, VRRP, HSRP, QoS, EVPN-VXLAN fabric Load Balancing: HAProxy, NSX-T, NSX-V 🔐 Network Security & Firewalls Vendors: Fortinet (FortiGate), Palo Alto, Juniper SRX/vSRX, Sophos (UTM, XGS), SonicWall, Zyxel, pfSense, OPNsense Services: NGFW rules, NAT, segmentation, IPS/IDS, DDoS mitigation, Zero Trust ☁️ Private Cloud & Virtualization Hypervisors: VMware (ESXi, vCenter), Proxmox, Hyper-V, KVM, Xen Virtual networking & security: VMware NSX-T / NSX-V, pfSense, OPNsense, Sophos 🌩️ Cloud & Hybrid Networking AWS: VPC, Transit Gateway, Site-to-Site VPN, Security Groups, hybrid connectivity Also experienced with Azure, Vultr, DigitalOcean, Linode 🔗 VPN & Secure Remote Access IPsec, OpenVPN, WireGuard, SSL VPN, GRE, L2TP, DMVPN, SD-WAN Enterprise VPNs, hybrid cloud connectivity, secure remote workforce 📡 UniFi / Ubiquiti Deployments UniFi network design and deployment for offices and multi-site businesses UniFi switches, access points, gateways, Dream Machine 🧰 Vendors & Platforms Cisco (Catalyst, Nexus, Meraki, ISR, ASR), Juniper (MX, vMX, EX, QFX, SRX), Huawei (CloudEngine), Fortinet, Palo Alto, Sophos, SonicWall, Zyxel, Ubiquiti/UniFi, VMware ⚙️ Automation, Monitoring & Documentation Automation: Python (Netmiko, NAPALM), Ansible, Terraform, REST APIs Monitoring: PRTG, Grafana, LibreNMS, Zabbix, Cacti, FastNetMon Documentation & IPAM: NetBox, phpIPAM 🐧 Linux Ubuntu, Debian, CentOS, FreeBSD, OpenBSD 📜 CERTIFICATIONS Cisco: CCNP, CCNA 💼 SERVICES • Network Design & Optimization (Enterprise, Data Center Fabric, Private Cloud) • Firewall & Security Hardening (NGFW, IPS/IDS, Zero Trust) • Private Cloud Build & Migration (VMware, Proxmox) • Cloud & Hybrid Networking (AWS VPC, Transit Gateway, Site-to-Site VPN) • VPN & Secure Remote Access (IPsec, SSL, SD-WAN, WireGuard) • UniFi Network Design & Deployment • Network Troubleshooting & Performance Tuning • Network Automation & Monitoring (Ansible, Python, APIs)

  • Network Engineering
  • Computer Network
  • Computing & Networking
  • Virtualization
  • VMware Administration
  • VMWare
  • DevOps
  • Juniper
  • Firewall
  • Cisco
  • VMware NSX
  • VMware ESX Server
  • VMware vSphere
  • Ubiquiti
  • Fortinet
  • Hosting Setup
  • Cloud Security
  • Cloud Migration
  • Cloud Architecture
  • IT Infrastructure
Stephen K.

Nairobi, Kenya

$100/hr
4.8
166 jobs

I help clients recover critical data, investigate cyber incidents, and understand what happened across computers, mobile devices, cloud accounts, email accounts, and online activity. My work focuses on digital forensics, data recovery, cyber breach investigation, OSINT, malware-related analysis, and incident response. Clients usually come to me when they need clear answers after a hack, data loss, account compromise, suspicious activity, deleted files, insider risk, or an online investigation. What I can help with: • Data recovery from computers, drives, mobile devices, and storage media • Digital forensic investigation of devices, files, accounts, logs, and user activity • Cyber breach investigation to identify what happened, how it happened, and what evidence is available • Email, cloud, and account compromise review • Malware, suspicious file, and unauthorized access analysis • OSINT and online identity investigation • Clear technical reports that explain findings in plain language • Practical next steps to secure systems and prevent repeat incidents I approach every investigation carefully, ethically, and confidentially. My goal is to preserve evidence, recover what is recoverable, explain the facts clearly, and help you make informed decisions. Tools I use: I use tools such as Autopsy, FTK Imager, R-Studio, Disk Drill, R-Drive Image, dd, xmount, Volatility, Registry Explorer, RegRipper, Wireshark, tcpdump, Zeek, Magnet AXIOM, Cellebrite UFED, ADB, email header analysis tools, browser artifact tools, log analysis tools, file recovery tools, and Linux forensic tools. I can also review disk images, memory dumps, mobile backups, cloud exports, email files, screenshots, logs, and other available evidence provided by the client. Data recovery note: Data recovery depends on the condition of the device, the storage type, the file system, and whether the data has been overwritten. For SSDs, recovery may be limited or impossible if TRIM or garbage collection has already cleared the deleted data. I always assess the situation first and explain what can realistically be recovered before proceeding. I approach every investigation carefully, ethically, and confidentially. My goal is to preserve evidence, recover what can be recovered, explain the facts clearly, and help you make informed decisions. I do not promise impossible recovery or unsupported conclusions. I provide clear findings based on the available evidence, the condition of the device or data, and the artifacts that can be verified. If you need help understanding a digital incident, recovering important data, or reviewing evidence, I can help you move from uncertainty to clear findings.

  • Digital Forensics
  • Network Analysis
  • Ethical Hacking
  • Information Security
  • System Security
  • Cyber Threat Intelligence
  • Security Assessment & Testing
  • Security Testing
  • Cybersecurity Monitoring
  • Network Security
  • Data Recovery
  • Recover Data Recovery Software
  • Cybersecurity Tool
  • Penetration Testing
  • Information Security Audit
  • Incident Management
  • Incident Response Readiness Assessment
  • Email Spoofing Detection
  • Data Breach Mitigation
Petar A.

Sabac, Serbia

$50/hr
4.9
265 jobs

✅ Professional Penetration Tester ✅ 3500+ Hours ✅ Top Rated Plus Freelancer Security Researcher and Penetration Tester recognized by the U.S. Department of Defense, AT&T, Sony, and Semrush for the responsible disclosure of 40+ vulnerabilities via HackerOne. Since 2022, an active member of the Synack Red Team - an elite tier of offensive security specialists vetted through rigorous technical and background screening. Every engagement concludes with a comprehensive technical report built to satisfy the specific penetration testing controls required for HIPAA, ISO 27001, SOC2, and PCI-DSS. I provide a high-level executive summary for stakeholders alongside deep-dive technical findings, fully reproducible Proofs-of-Concept (PoCs), and prioritized remediation steps to ensure your team can effectively close every gap before your audit. Specializing in black and gray box testing of live web applications, cloud environments, and networks, covering all common attack vectors, business logic flaws, and discovering previously undisclosed vulnerabilities (0days) to prevent high-impact data breaches. Service Description: 1) Web Application Penetration Testing (OWASP Top 10, PTES, ASVS, Business Logic Testing) 2) Mobile Application Penetration Testing (OWASP Top 10, MASVS, MASTG, PTES) 3) Network Penetration Testing (Active Directory, Entra ID, Internal & External Network) 4) API Security Testing - REST, GraphQL, SOAP, gRPC, Webhooks (OWASP API Top 10) 5) Cloud Security Testing - AWS/Azure/GCP/OCI/Alibaba/IBM/DigitalOcean/SaaS/IaaS/PaaS 6) Cloud-Native & Container Security (Kubernetes, Docker, OpenShift, EKS/AKS/GKE) 7) LLM Security Testing (OWASP LLM Top 10, Prompt Injection, Data Poisoning) Tools used in engagements: BurpSuite Professional | Custom Python scripts | BloodHound | Impacket Framework | Responder | Metasploit | Mimikatz | Nuclei | Nmap | FRIDA | Android Studio | Pacu | Prowler | Postman Identify and secure your attack surface before threat actors do ! Message me to discuss your project requirements.

  • Vulnerability Assessment
  • Penetration Testing
  • Network Security
  • Security Testing
  • AI Security
  • Internet Security
  • Network Penetration Testing
  • Web App Penetration Testing
  • Ethical Hacking
  • Black Box Testing
  • Reverse Engineering
  • JavaScript
  • Web Application Security
  • Cloud Security
  • API
  • OWASP
  • NIST SP 800-53
  • HIPAA
  • PCI DSS
  • Bug Bounty
Kent C.

Plano, Texas

$49/hr
5.0
2 jobs

I design, deploy, integrate, and optimize enterprise monitoring, observability, SIEM, and security platforms across networks, servers, applications, databases, storage, cloud resources, and endpoints. My experience includes designing and deploying one of the largest SolarWinds environments in the federal government, supporting thousands of servers, hundreds of applications, and more than 90,000 users. The environment included SolarWinds API and SWQL integrations with Microsoft Graph, Ansible automation, AWS, Azure, application owners, SOC teams, network administrators, and server administrators supporting Federal Aviation Administration operations. I can assist with: SolarWinds architecture, installation, migration, configuration, upgrades, tuning, and troubleshooting Network, server, application, database, storage, cloud, NetFlow, log, security, and availability monitoring SWQL queries, SolarWinds APIs, custom dashboards, reports, alerts, thresholds, and automated workflows Monitoring-tool consolidation and integrations with ticketing, automation, cloud, SIEM, and security platforms OpenTelemetry and .NET telemetry pipelines Syslog and HTTPS telemetry forwarding Alert tuning, anomaly detection, incident triage, and 24×7 monitoring workflows Custom monitoring sensors, APIs, dashboards, and AI-assisted alert enrichment Pre-sales assessments, proof-of-concept deployments, production implementation, and post-deployment support My monitoring-platform experience includes SolarWinds, CiscoWorks, HP OpenView, CA Unicenter TNG, CA eHealth, CA Spectrum, Wily, Quest Foglight, Mercury Interactive application performance management, Concord eHealth, SystemEdge, TrapDirector, Lancope StealthWatch, NetFlow, sFlow, SigNoz, OpenTelemetry, Snowflake Data Lake integrations, and custom SIEM and observability platforms. I have delivered monitoring and professional-services projects for federal agencies, Department of Defense environments, Fortune 500 organizations, global enterprises, cloud providers, and mission-critical operations teams. My background covers the complete monitoring lifecycle: requirements gathering, architecture, installation, discovery, integration, dashboard development, threshold configuration, alerting, automation, documentation, knowledge transfer, and ongoing optimization. At CyVectors, I also built a modular telemetry and monitoring ecosystem that includes endpoint health monitoring, Windows Event monitoring, log-file monitoring, DNS activity, network egress, NetFlow-style data movement, wireless and Bluetooth visibility, file-access activity, email telemetry, vulnerability assessment, dashboards, localized APIs for AI analysis, chat with your data pipelines, OpenTelemetry pipelines, and integrations with SolarWinds and other SIEM platforms. I am best suited for organizations that need an experienced engineer who can take ownership of a monitoring deployment from initial design through production operation—without requiring separate resources for architecture, installation, integrations, automation, alert tuning, reporting, and troubleshooting.

  • Splunk
  • SolarWinds VoIP & Network Quality Manager
  • Network Monitoring
  • Cybersecurity Monitoring
  • Sales Engineering
  • Demo Presentation
  • Threat Detection
  • Ethical Hacking
  • Digital Forensics
  • Scripting
  • API
  • AI Development
Kevin B.

Chicago, Illinois

$150/hr
5.0
115 jobs

✨🥇🏆 - I help businesses design, deploy, secure, and optimize IT infrastructure. With experience across networking, virtualization, cloud platforms, Microsoft technologies, and cybersecurity, I can step into existing environments, solve complex technical challenges, or build new infrastructure from the ground up. 🏆🥇✨ - My background includes working with enterprise and SMB environments, delivering everything from infrastructure migrations and platform upgrades to security improvements and performance optimization. I focus on implementing solutions that are secure, scalable, and aligned with project goals. 👉 My expertise includes: ✅ - Networking: Cisco, Meraki, UniFi, VLANs, VPNs, routing, switching, wireless deployments, and network troubleshooting. ✅ - Cybersecurity: SonicWall, Palo Alto, Fortinet, Cisco, firewall configuration, VPNs, access control, network hardening, and security best practices. ✅ - Virtualization: VMware vSphere, Citrix Virtual Apps & Desktops, Citrix MCS, PVS, App Layering, XenServer, Microsoft Hyper-V, VDI deployments, and server migrations. ✅ - Microsoft Technologies: Windows Server, Active Directory, Group Policy, DFSR, WSUS, Microsoft Exchange, Microsoft 365, Microsoft Entra ID (Azure AD), and PowerShell automation. ✅ - Storage & Infrastructure: Dell EMC, Pure Storage, SAN deployment, disaster recovery planning, and infrastructure modernization. ✅ - Systems Engineering: Server deployment, cloud migrations, performance tuning, infrastructure upgrades, automation, and complex troubleshooting. 🥇 - I believe technology should solve problems, not create them. My approach is straightforward: understand the objectives, identify the right solution, and deliver high-quality work with clear communication throughout the project. Whether it's a migration, virtualization deployment, network redesign, cloud implementation, security hardening, or resolving a complex infrastructure issue, I focus on delivering results that meet the agreed scope and timeline. 🥇 - If you need an experienced infrastructure engineer for a well-defined project, I'd be happy to discuss your requirements.

  • Network Administration
  • Firewall
  • Network Security
  • Microsoft Active Directory
  • Citrix
  • Cisco Meraki
  • VMWare
  • Server Virtualization
  • Storage Area Network
  • Ubiquiti
  • Hosting Setup
  • Cloud Migration
  • Email Security
  • Office 365
  • Fortinet
  • GoDaddy
  • Microsoft Hyper-V Server
  • Palo Alto Firewalls
  • WiFi
  • Microsoft Azure

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Don't just take our word for it

Write a Job Description to Hire Network Administrators

Maintaining all the technology behind the scenes that makes an organization run is no small feat. IT needs fluctuate, change, and need constant monitoring and tweaking to stay at peak performance, which means it’s crucial to have a seasoned network administrator. This professional can ensure all these components—servers, data storage, Internet connections, user accounts, security protocols, email providers, firewalls, and more—are working in harmony like a well-oiled machine.

A network is your business’s lifeblood; when it goes down, so does your ability to be productive and provide a service to your customers. Ideally, you want a network that’s optimized to do what you need when you need it, with minimal downtime—and a network administrator is the professional trained to maintain that architecture for you.

“A system administrator is an essential member of a well-functioning company. System administrators ensure that all IT assets of a business work effectively, serving company employees best and streamlining company operations.” – System Administrator, A Secret Weapon to Keep a Software Company Organized

Businesses of all sizes need the help of a network admin at one point or another to maintain or expand their networks. And as businesses grow and change, so do requirements from their networks. While there are day-to-day tasks and incident response needs associated with network administration, you may need a dedicated network administrator for specific scenarios, whether that’s to help you scale up, overhaul, or switch services.

No matter what level of help you need, hiring a freelance network administrator is a cost-effective way to generate stability within your organization and help you develop confidence that the core of your business communication and data sharing will be reliable in times of high use and stress. Here’s a quick overview of what a network admin does and some tips for writing a job description that helps you find the best one for your needs.

Related:

What does a network administrator do?

Network administration specialists are highly trained computer information technologists with plenty of experience in maintaining, securing and diagnosing business networks.

A network administrator can provide your organization or business with a variety of services, whether they’re day-to-day, incident-based, or general improvements. What you need from a network admin will depend on the current phase of your network’s life cycle, whether it’s scaling up to meet new bandwidth requirements or in response to a recent security breach. They can include:

  • Network maintenance, and expansion
  • On-site server management and/or servers deployed in the cloud
  • Regular updates and maintenance to software, security systems, and software licenses
  • Security—which can include firewalls, email filters, vulnerability and penetration testing, installing and updating security systems, training users on best practices, etc.
  • System monitoring (for performance, security breaches, and data management practices)
  • Setting up users, email accounts, security protocols, endpoint security, etc.
  • Specific server operating systems (e.g., Windows, Cisco, etc.)
  • Wireless network implementation and communication protocols
  • Router management
  • Hardware updates and implementation, if required

Many organizations use an incident tracking system to flag, prioritize, and delegate network issues that need resolving. Depending on the size of the organization, network administration can be a sole person’s responsibility or can be divided up between people and teams.

A note about certifications

There are a number of industry-recognized certifications for systems/network administration that make it easier to note the skill level of a potential professional such as CompTIA certifications, Cisco certifications, and Microsoft Certified Solutions certifications. A good network admin won’t need to have all of these, but having up-to-date ones is a good indicator they’ve got current skills and will be able to help you set up a future-proof network, not one that will be outdated and prone to failure, requiring you to hire another network admin to make fixes behind them.

Defining your network administrator project

The first thing you should nail down is what you need the network admin to do. As mentioned above, what you need from a network administrator is going to largely depend on the size of your network and where yit is in its life cycle. Do you have an existing network but are experiencing some performance issues? If so, you’ll want a network administrator to run an audit that assesses the health of your system and to then provide a plan for upgrading, augmenting, and expanding your hardware and software to beef up bandwidth. You might just need a network pro to troubleshoot some issues, or update a few systems. Or, do you need a network admin to handle day-to-day support tickets?

Provide a full list of all of the hardware, systems, software and security measures you currently have in place. If possible, generate a report about network traffic, performance, and how many servers, offices, and end users you have. Give as much detail as you can (e.g., is your system LAN?); this will paint a picture of what the network admin will be working with, and provide context around your project description. Finally, briefly explain your goals. What do you need their help accomplishing? What are your end goals—better performance, better security, more bandwidth?

Finally, you’ll probably want to specify for certifications to make sure they’re qualified and their skills are up to date. Good ones to look for include Cisco CCIE, Cisco CCNP, and CompTIA Network+. While not mandatory, these help ensure you’re getting a network admin who’s using the newest best practices. If you’re setting up a new network from scratch, filtering out the “old dogs with old tricks” will ensure your network is future proofed—not merely a functional but outdated network that’s likely prone to failure.

Writing a network administrator project description

Now that you’ve clearly defined your project deliverables, it’s time to write your network administrator project description. The description will determine the quality of the system administrator you’ll attract, so be sure to include as much context and detail as possible.

Be clear and succinct in your title and include any relevant technology they should know in order to work within your system. If you have enough information to provide a set list of deliverables, include those with any hard and fast deadlines you may have. Also, provide information about how you’ll give the professional access to your systems.

Note: For security reasons, you may choose to be vague or open-ended when describing your project, which is fine—just be sure to provide enough context so the candidate knows if he or she is a good fit up front, and can respond with a detailed enough proposal.

Sample Project Description

Below is a sample of how a project description may look. Keep in mind that many people use the term “job description,” but a full job description is only needed for employees. When engaging a freelancer as an independent contractor, you typically just need a statement of work, job post, or any other document that describes the work.

Title: [Certified] Network Administrator Needed to Help Expand and Integrate Existing Network & Overhaul/Upgrade Security Protocols for Merger

Description:

We are a medium-sized (~115) advertising and PR agency that recently acquired a small pharmaceutical ad agency to ramp up our existing healthcare expertise and offerings. Our existing network is at capacity for users and data and has experienced some lags in performance lately. With our new acquisition, we’re looking to add more servers, expand our bandwidth, onboard the new users and integrate their data into our system. Most importantly, we’ll need to implement some new, tighter security measures to protect the sensitive data and communications of our new pharma clients.

Project Scope & Deliverables:

We need an assessment of our current system, a detailed plan for an overhaul of our architecture, and detailed suggestions for a new system. The merger will be finalized EOY ‘17 so we’d like to have an actionable plan in place and assistance with day-of migration of their systems to ours.

Additional: If phase one goes well, we’d love help with planning and implementing an employee training program on email, internet, device and data security best practices as we onboard new talent.

About Us:

We are Paddock Partners, a medium-sized PR and advertising firm with a growing specialty in healthcare and pharmaceutical advertising. Our recent acquisition of HealthStar Marketing will make us a fully equipped healthcare marketing agency able to take on high-profile drug and pharma clients with education, launch, OPDP approval, and more.