✅ 5+ Years Securing & Managing Complex IT Systems Hi, I'm a Network & System Administration specialist with deep expertise in infrastructure security, firewall configuration, server hardening, and network troubleshooting. I’ve helped companies across industries secure their systems, streamline their networks, and ensure uptime-critical environments. 🔧 What I Do Best: Network design & setup (LAN/WAN, TCP/IP, DHCP, DNS, VLANs) Server management ( Windows Server, Active Directory) Remote IT management, Clustering and virtualization, Firewall configuration (pfSense, Ubiquiti, Cisco ASA, Fortinet) VPN & remote access (OpenVPN, IPsec, WireGuard) Security audits & patching Intrusion detection/prevention (IDS/IPS) Cloud infrastructure (AWS, Azure, GCP) Microsoft Office365 expert, DKIM, SPF MX RECORD 🛡️ Security-Focused Approach I take a proactive stance on system security—auditing configurations, patching vulnerabilities, and implementing best practices to prevent breaches. Let’s keep your systems fast, secure, and reliable. I’m ready to discuss your project—just send a message. IT Certifications I have, Certified Network Administrator/ Enterprise Ubiquiti/Unifi Network Expert Certified Systems Engineering Expert Certfied End-Point Security Specialist I have deep understanding of the Following tools and Technolgies. Connectwise Manage Expert, Screenconnect Expert. Connectwise implementor. Synology NAS Zoom Phone and Zoom Desktop Phone Expert Email Protection and Email Delivery Specialist, Hyperv, VMware, Vsphere, GCP, AZURE,AWS Expert. Certified IT Support Specialist/Cyber Security Consultant Certified Network Security Expert (Home / Business), VAPT Certified System Security Expert. Certified HelpDesk Support Specialist Microsoft Azure Certified, Microsoft365/Azure EntraID Network Security Certified Network Security and deployment Consultant Domotz Expert/ Synology consultant Fortigate Certified Sonicwall, Ubiquiti. Unifi/Ubiquiti Expert Hands on Experience on: Microsoft Exchange Online Windows 10 Administration Server Administration Experr Windows 11 Administration Remote IT Management/ VPN management Windows Server Administration Expert Domain Migration Microsoft Outlook Network Equipment consultation Server Virtualization Microsoft Windows Powershell Microsoft Active Directory Office 365 DNS DHCP Zendesk trainer, EDR, XDR, Connectwise Admin, CWRMM, Sentinal one Azure Sentinal. Fortinet, Cisco, Network monitoring Expert, Veeam Backup Specialist(Cloudberry, SPX) HIPPA complaince certified, PCI DSS accessor, PCI DSS complaince Expert. Having Certs (NSE1, NSE2, NSE3) ,CCNA, CCNP(training) Crowd Strike Deployment, TrendMicro deployment. i have worked Closely on Network Design Network security OWASP mitigation System Hardening System Security Network Optimization Server administration Server Migrations Network troubleshooting Firewall Configurations Backup policies / configurations. Desktop support. Cloud management Failover clustering Deployment and Management (Windows Server 2019, 2016, 2022). System security Solutions and Deployment. System Hardening. Hands on experience on Cisco Switches(CCNA CCNP LEVEL) and SonicWALL's + Fortigate firewalls, QNAP , QSAN, SYNOLOGY, Buffalo NAS, During My freelancing career i have worked on multiple projects like Network Designs solution deployment across the organization and on top of it have hands on Experience of vendor Management and have know how towards the TrendMicro and Crowd Strike. Setting up IT office were the main procedures during my Job Tenures and also Veeam backup deployment across the organization. EDR, MDR AWS AZURE Specialist. Experience in QNAPS, Synology, Virtualization Expert, Hyper V. Hands on Experience for providing Remote IT Support to multiple clients. Managjng Networks servers plus Security configurations. Hypervisor Expert, Remote IT tools complete Hands on Experience, vpn Expert wiregaurd, openvpn, NAS Expert. Ping me If you require Any sort of Assistance,

I help businesses and IT teams build stable and cost effective systems. I have more than 14 years of experience in a major security company, working with projects of different sizes, from small offices to large distributed environments. My main areas of work: • Windows Server infrastructure: AD, DNS, GPO, RDS, Hyper-V, Failover Clustering • Networking: MikroTik, UniFi, VPN setups (site to site and remote access) • Virtualization: Hyper-V, VMware (ESXi, vSAN), Proxmox VE & PBS • Backup and storage: Veeam, Synology, QNAP, DAS/NAS systems • Remote management infrastructure: RustDesk, VNC, NanoKVM • Cloudflare Tunnels • Drake Tax software support I focus on practical solutions that meet business needs and stay in the budget. Whether you need a new setup or help maintaining an existing one, I try to make things reliable and simple to manage. Certifications: MCSE | MCSA | AZ-104 Open for long term remote roles or hybrid setups.

Let's discuss how I can enhance your security posture. Certifications: 3x Fortinet FCSS - SDWAN & Network Security / Zero Trust / Public Cloud 3x AWS - Solutions Architect / Advanced Networking / Security Speciality Cisco CCNA and Cisco IOT SM Skills: Secure Enterprise Network Advanced SDWAN Configuration Fortinet SDWAN and FortiManager Templates ZTNA Public Cloud Security Directory and Authentication Systems SIEM technology Advanced Technical Support and Troubleshooting

I have been in network engineering and operations since 2014. Experienced in Network Engineering which corresponds to implementation, troubleshooting, optimization, integration and managing various network infrastructure, not limited to IP backbone network of the largest Service Provider in the Philippines (Smart Communications, INC.), enterprise networks, Cisco hosted collaboration solutions, and one of the largest BPO companies globally. * Adaptable to new technologies. * In depth network troubleshooting skills. * Able to work under pressure and with minimum supervision. * Has a great attitude towards work. Knowledge and Skills: * EIGRP, OSPF, BGP, MPLS, L3VPN, VRF, HSRP, Cisco SD-WAN, Cisco NGFW firewall, Palo Alto Firewall, Juniper switches, and Arista Routers/Switches/Wireless devices. * Ability to comprehend and create complex network maps and drawings in standard design tools (i.e. Visio or draw.io) License/Certifications: * Registered Electronics and Communications Engineer (Dec. 2013) with license no.: 0056129 * Cisco Certified Network Professional (CCNP) routing and switching: CSCO12602605 * Cisco Certified Design Professional (CCDP): CSCO12602605

I'm Maher Haddad, an experienced Network Engineer and Certified Trainer for MikroTik, Cisco, IPv6 Forum, and LigoWave technologies. With over two decades of experience in the IT industry, I'm also a published author of several IT books available on Amazon. My journey began in 2003 with Cisco certifications, and I've since expanded my expertise to include various other leading brands. My current certifications include: • Cisco CCNP Routing and Switching • Juniper JNCIA • Huawei HCIA • MikroTik (MTCNA, MTCRE, MTCWE, MTCSE, MTCTCE, MTCUME, MTCSWE, MTCEWE, MTCINE, MTCIPv6) • IPv6 Certified Network Engineer (Silver and Gold) I've provided consulting services to international companies and ISPs worldwide, specializing in: • Routing: Static route, OSPF, BGP, MPLS, RIP • Switching: VLAN, QinQ, Bridging, STP/RSTP/MSTP, Port Isolation • Traffic Control • Network Security • IPv6 Implementation • Wireless LAN • VPN Solutions (PPTP, SSTP, L2TP, Wireguard, Zerotier, GRE, IPIP, EOIP, IPSEC) • QOS As an educator, I run my own online school and have published 75 courses on Udemy, reaching over 80,000 students. Many of these courses are highly rated and best-selling in their categories. I'm eager to bring my expertise to your IT projects and help you achieve your technological goals. Let's connect and discuss how I can assist you in optimizing your network infrastructure.

I’m a Senior System and Network Engineer with over 18 years of hands-on experience in IT infrastructure, cybersecurity, and cloud environments. As the founder of AOVD Systems, I help businesses and professionals around the world design, secure, and optimize their digital environments — from local servers to global cloud platforms. ⸻ 🔧 What I Do I deliver end-to-end IT solutions that are secure, scalable, and cost-efficient. My core areas of expertise include: • 🖥️ System Administration & Virtualization – Microsoft Server, VMware, Hyper-V, ESXi • ☁️ Cloud & Microsoft 365 Migration – Azure AD, Exchange Online, Intune • 🔐 VPN Configuration & Network Security – IPSec, SSL VPN, SAML, Multi-factor Authentication • 🧱 Firewall & Endpoint Protection – Fortigate, SonicWall, Cisco, Huntress, FieldEffect, Defender for Business • 💾 Backup & Disaster Recovery – Veeam, Nable, Acronis, Anxient • 📈 Network Performance & Monitoring – PRTG, Nagios, ManageEngine, NetFlow Analyzer • 🔄 Managed IT Services & Remote Support – 24/7 monitoring, patch management, SLA-based response ⸻ 🌍 Who I Work With I’ve supported clients across Europe and the U.S., including: • Government and public institutions • Small and medium businesses seeking reliable IT outsourcing • Professional poker players and private clients requiring secure, anonymous, and latency-optimized VPN setups • Teams transitioning from local servers to the cloud or hybrid infrastructure I combine enterprise-level knowledge with a hands-on, personal approach — ensuring speed, security, and discretion at every step. ⸻ 🎯 Why Clients Choose Me • Proven track record of resolving complex infrastructure issues under pressure • Certified expertise across multiple vendor ecosystems (Microsoft, Cisco, VMware, Veeam) • Transparent communication and detailed technical reporting • Tailored solutions — I don’t copy-paste templates, I solve your specific problem “Vladimir fixed in one hour what others couldn’t in three days.” “Professional, responsive, and precise. My systems are finally stable.” ⸻ 🎓 Certifications & Training • Microsoft Certified Solutions Expert (MCSE) – Server Infrastructure • Cisco Certified Network Professional (CCNP) – Routing & Switching • VMware Certified Professional (VCP) – Data Center Virtualization • Veeam Certified Engineer (VMCE) – Backup & Replication • Microsoft 365 & Azure Administrator Associate • Nagios & PRTG Advanced Monitoring Implementation • ManageEngine Suite Training – Endpoint Central & NetFlow Continuous learning is part of my work ethic — I stay updated with the latest in cybersecurity, automation, and cloud technologies to deliver cutting-edge solutions to every client. ⸻ 🚀 Let’s Work Together Whether you need a VPN configuration, network performance audit, or complete IT infrastructure management, I’ll help you build systems that are secure, stable, and future-ready. 📩 Let’s connect — tell me about your IT challenge, and I’ll design a fast, professional, and cost-effective solution.

I am a Dynamic, Dedicated, Passionate and Quickly Adaptable Freelancer with Technological innovations. I am a 🏅Upwork-Skill-Certified Freelancer with ✅100% JSS ✅ 70%+ Long-Term Clients ✅ 80%+ Clients Recommendation ✅ 90+ Active and Completed Jobs with Positive Feedback🏅Architect Certified on Sophos, Fortinet Firewalls and Endpoints Managements ✅ Others Certification on Network and Security✅ Strong and long Experiences on Fortinet, Sophos, SonicWall, Palo-Alto, PFSense Infrastructures Deployments, Migration and Managements✅ Any kinds of Wireless and Voice Solution Deployments✅ Network, System Security & Compliance Managements✅ Strong Experience on Routing & Switching🏦 Long-Experience with MSP, Corporate and Solution/Service-Provider Sectors. 🏦 Already worked with 90+ clients from different regions such as Asia, Africa, US, Europe etc. 🎖️Certifications (Completed & Enrolled) • Upwork Skill Certification - Customer Service. • Certified Architect by Sophos and Fortinet. 🏅 Sophos Certifications: • Sophos-Firewall v19.5-Engineer. • Sophos Firewall v19.5-Architect. • Sophos Firewall v19.5 to v20.0 Certified Architect Delta (AU80). • Sophos Firewall v19.5 to v20.0 Certified Engineer Delta (EU80). • Sophos Firewall v20.0 to v21.0 Certified Architect Delta (AU80). • Sophos Central Endpoint and Server v4.0-Engineer. • Central Endpoint and Server v4.0-Architect. • Sophos Central Endpoint v4.0 to v5.0 Architect Delta (AU15). • Sophos Central Engineer Delta v4.0 to v5.0 (EU15). 🏅 Fortinet Certifications: • NSE-7 (Network Security Architect) –NSE-ID:- 0Qjbf0qGSd • NSE-4 (Network Security Professional) – NSE-ID:- GThFxY1viO • NSE-5 (Network Security Analyst) on FortiAnalyzer- NSE-ID: - 8gIRCniwPN. • NSE-1 (Network Security Associate) By Fortinet License Number: OYBF7cetpL. • NSE-2 (Network Security Associate) By Fortinet License Number: FTsFjlmHck. 🏅 Other Certification: • CNSS (Certified Network Security Specialist) By ICSI, UK License Number: 18427811 • Cisco Certified Network Associate (Routing & Switching) Cisco-ID: - CSCO13303817 Here, I would like to share my Working experiences, fields of expertise and much more- ✅ I have 9 years plus hands-on experiences on Network, System, Security administration, Deployment and Migrations on different Infrastructures along with direct involvements/cooperation on different known issues from Deployment stage to end-user’s support. ✅ Fields of Specialization: 1. Because of having 9 years plus exclusive experiences on different Fortinet, Sophos, SonicWall, PFSense, Palo-Alto and other Infrastructures Deployments and Administration I can work with the Complete Design, Deployments, Migrations and Integrations on these Different types of Infrastructures such as- • Fortigate, Forti-APs, Forti-Switches, FortiVoice-Enterprise, Forti-Manager, Forti-EMS,FortiAnalyzer, FortiAuthenticator, FortiNAC, Fortinet Security Fabric Devices, FortiSandbox, FortiToken/Mobile/Service. • Sophos Infrastructures Managements such Firewalls, Endpoints, Switches, APs etc. • SonicWALL Infrastructures Managements such as Firewalls, NSM, Capture-Clients Endpoints etc. • Palo-Alto, Barracuda, PfSense, Cisco-Firepower, Firepower-Thread Defence and FMC and Others Firewalls Managements. • Migration To/From any of these above Infrastructures. 3. Long experiences on the Network and System Administration on these Infrastructures- • Routing & Switching on Cisco, Mikrotik, Juniper, HP, Dell, Aruba etc. • Wireless Implementation on Cisco, Aruba, Ruckus, 4Ipnet, Unifi/Ubiquiti, Forti-AP, Cambium, Altai, TP-Link-Omada, Teltonika etc. • Mail-Server Administration on Office365, G-Suite by Google, Zimbra etc. • Windows Server Managements. • Virtualization & Datacentre Managements on VMware, ESXi, vSphere or VCenter, Hyper-V, Synology-NAS/SAN and Others. • Voice Solution implementation on renowned Voice Solution Providers such as FortiVoice Enterprise, Grandstream, 3cX, Synway, Yeastar-PBX, FreePBX etc. • Endpoint Solution Deployments on TrendMicro, Sophos Endpoint Protection, FortiClient by Forti-EMS (Endpoint Management Server), ESET etc. • Complete Video Conferencing Solution on Dahua, Polycom etc. • Surveillance, Attendance reader solution on Hikvision, Dahua, ZKTecho, Handuri etc. 4. I am a quick and dynamic learner. I can adjust myself with the Technological innovation within a very short amount of time. 5. I am a technical person with a Never Give-Up character. I have multiples valuable feedback with great reviews on Upwork. You can also have a look at that. If you have any further query on me just send "Hi" in Upwork.

👑 Expert Vetted - Top 1% of talent on Upwork ⭐️ Top Rated - Highly rated for the work provided 🎯 100% Job Success Score 🕒 600+ hours on Upwork ✅ 30+ years of experience ✅ 50+ projects delivered here on Upwork With over three decades of experience under my belt as a network and security engineer, I've traversed the ever-evolving landscape of LAN/WAN network design, network security, firewalls, implementation, and maintenance. My expertise is not merely a testament to time, but also backed by credentials including Cisco CCNP (route/switch), a Cisco CCDP for network design, and a PCNSE for Palo Alto Networks. I am always available for consulting for short-term and long-term projects. Thank you.

Network Engineer with a proven track record of delivering network solutions, IT Infrastructure, and telecom services. My area of expertise includes. . Certified: CCNP, AZ305, AZ104, AZ-700, CCNA, ITIL, MCSA, ZIA. . Cloud: Azure, AWS, and GCP. · Configuration of networks, servers, switches, and routers. . Zscaler: ZDX, ZPA & ZIA . Cisco R&S, Cisco ISE, Cisco ASA, Juniper, ESXI VMware, Hyper-V. . Wireless Tech: Meraki, Aruba, Aerohive, Ubiquiti. . CRM: Zendesk, Halo, Fresh Service and ServiceNow . NMS: SolarWinds, Opmantek, Mutiny, Datadog . Firewall: Checkpoint, Palo Alto, Cisco ASA, FortiGate . Windows Server, Linux, Exchange Servers, O365, Active Directory, SSL Certs, DNS, DHCP, SCCM.

Enterprise Systems & Network Architect | 12+ Years Enterprise Experience High-stakes infrastructure requires zero-downtime execution and airtight security. I help mid-sized businesses, datacenters, and enterprise teams design, secure, and migrate critical hybrid environments without unexpected outages or security backdoors. Whether you need emergency server recovery, complex firewall architecture, cloud migration, or enterprise Office 365 tenant setup, I deliver reliable, enterprise-grade engineering. Core Specializations & Tested Deliverables: 1. Network Security & Firewall Engineering Deployment, policy auditing, and hardening for Fortinet (FortiGate), Sophos (XG/UTM), SonicWall, and pfSense. Firewall migration (e.g., SonicWall to pfSense, Sophos deployment, and router isolation). Site-to-Site VPNs (IPsec/GRE), SSL VPN, FortiClient, and OpenVPN remote access with RADIUS/MFA. Layer 2/3 network design, VLAN segmentation, ACLs, and UniFi enterprise deployment. 2. Server Virtualization & Cloud Systems (Azure, AWS, M365) Enterprise virtualization management: VMware ESXi performance tuning, crash recovery, Hyper-V, and Citrix Xen. Windows Server environment management: Active Directory migrations, Group Policy (GPO) security rules, DNS, DHCP, and IIS. Microsoft 365 tenant setup, Entra ID (Azure AD) sync, Exchange Online, and Azure VM hosting. Linux administration (Ubuntu, Debian, CentOS, Red Hat) for production web & database workloads. 3. Unified Communications & VoIP Administration Enterprise VoIP deployment: FreePBX, Asterisk, 3CX, and Grandstream HT813 integration. Asterisk PBX migrations, SIP trunking configuration, and web interface troubleshooting. Why Clients Hire Me: 100% Job Success Rate: 90+ completed enterprise contracts with zero tolerance for critical errors. Datacenter Background: Hands-on datacenter engineering experience ensuring physical and virtual reliability. Rapid Incident Response: Fast triage for down firewalls, broken VPNs, and unresponsive servers.