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MD Sohail Baig Network Engineer | IT Infrastructure Specialist | Cybersecurity & Web Solutions Expert With over 9 years of hands-on experience, I help businesses design, secure, and optimize their IT infrastructure for maximum performance, reliability, and scalability. I specialize in building robust network architectures, strengthening cybersecurity defenses, and delivering modern web solutions tailored to business needs. Core Expertise Network Design & Implementation (LAN/WAN, SD-WAN) Routing & Switching (Cisco, Juniper) Network Security (Palo Alto, Fortinet Firewalls) VPN Setup (Site-to-Site, Remote Access) Intrusion Detection & Prevention Systems (IDS/IPS) Cloud Networking (AWS, Azure basics) VoIP & Unified Communications Network Monitoring & Troubleshooting Website Development (Business websites, portfolios, landing pages) WordPress Development & Customization Website Deployment & Hosting Setup Basic Frontend Development (HTML, CSS, JavaScript) Website Security & Performance Optimization Domain & DNS Configuration I combine network engineering, cybersecurity, and web development skills to provide complete IT solutions — so you don’t need multiple freelancers. Whether it's fixing a network issue, securing your systems, or launching your website, I ensure everything works seamlessly together.

I am a Network & Security Subject Matter Expert (SME) with 12+ years of hands-on experience in enterprise network architecture, security design, planning, and end-to-end implementation. I help organizations design secure, scalable, and high-performing network infrastructures across on-prem, hybrid, and cloud (Azure) environments. I’ve delivered multiple enterprise programs for customers across different industries, including Del Monte, Subaru, Enercare, Bank of America, and CenturyLink, supporting initiatives like modernization, secure access transformation (ZTNA/SASE), segmentation, firewall migrations, and cloud network deployments. My strength is bridging architecture + real implementation—I don’t just design diagrams; I also deliver working solutions, documentation, migration plans, and operational handover. Core Expertise Network Security Architecture: design, implementation, hardening, and migration planning Enterprise Network Design: segmentation strategy, routing/switching architecture, high availability, resiliency SASE / Zero Trust: Zscaler ZIA, ZPA, ZDX end-to-end deployments and troubleshooting. Netskope SASE Realtime Protection, SSL Decryption, Web filtering, and troubleshooting. Azure Networking: Azure Firewall, vWAN, ExpressRoute, hybrid connectivity, network security posture Load Balancing / ADC: F5 LTM, DNS — full lifecycle implementation Firewall Platforms: Cisco ASA, Cisco Firepower, Fortinet Firewall, Fortinet SD-WAN Wireless Enterprise: Cisco WLC 9800 end-to-end deployment CDN / Edge Security: Imperva CDN end-to-end implementation Tools & Technologies Zscaler: ZIA | ZPA | ZDX Firewalls: Fortinet (Firewall, SD-WAN), Cisco ASA, Cisco Firepower Cisco: Catalyst Switches, WLC 9800 F5: LTM, DNS Cloud (Azure): Azure Firewall, Azure vWAN, ExpressRoute Other: Network Segmentation, Secure Access Design, Enterprise Network Architecture, Imperva CDN What I can do for you on Upwork ✅ SASE / Zscaler deployment (ZIA/ZPA/ZDX) — design → rollout → validation → support ✅ Azure networking design & deployment (vWAN, ExpressRoute, Azure Firewall) ✅ Firewall migration & implementation (Fortinet/Cisco) with minimal downtime ✅ Enterprise network architecture (HLD/LLD), segmentation strategy, implementation roadmap ✅ Troubleshooting complex performance/security issues (routing, policies, tunnels, proxy, latency) ✅ Build project documentation: HLD, LLD, runbooks, cutover plan, rollback plan, SOPs Deliverables You’ll Receive Architecture diagrams (high-level and detailed) HLD/LLD documentation Implementation plan + cutover/rollback Configuration guidance / best practices Testing & validation checklist Knowledge transfer/handover documents If you need someone who can design like an architect and deliver like an engineer, I can help. Just FYI, I have a USA B1 Visa, So If any short-term onsite business requirment I can travel there.

I am a CCIE Security/NSE4/AWS, Azure and OCI Foundation certified network professional and I have worked for 6 plus years in Cisco TAC security team. I have an over all 13 plus years of experience. I have worked on multivendor products like firewalls like Palo Alto, Cisco, Fortigate, Sonicwall etc, load balancers (F5 LTM, AFM), SDN solutions, Cisco Switches like catalyst, nexus etc. I have good exposure of configuring cisco switches (Nexus and Catalyst) and routers. I have expert level knowledge of Cisco firewalls (ASA/FTD), fortigate, pfsense and palo alto. I have very strong troubleshooting skills and I have done several migrations of firewalls and other technologies. I have migrated several multi vendor firewalls to Cisco Firewalls and vice versa. Also, have worked on a mass migration project like migrated more than 70 cisco ASAs to Cisco FTDs. I am managing more than 15 Palo Alto firewalls and 30 Fortigate firewalls. I have sounds concepts and working knowledge of AWS advanced networking and Azure networking. I have configured several VPN connections between cloud and multivendor firewalls.

Network Monitoring and Management: Utilize tools like PRTG and Auvik to monitor over fifty-five global sites, 2517 devices, and more than 8000 sensors. Oversee 183 wireless controllers, switches, and access points. Monitor data centers located in Azure Central US, Azure East US2, and Western Europe. Configure and maintain network devices including UPS, FortiGate Firewalls, Meraki switches, and Aruba & Ruckus access points. Ensure optimal performance of servers using WMI ping, SNMP V2/V3, and other monitoring protocols. Track various traffic types such as core traffic, base port traffic, guest traffic, VPN traffic, and workstation traffic. Monitor server metrics including uptime, CPU load, memory usage (physical and virtual), and disk usage.Ensure the functionality of critical services like CrowdStrike Falcon sensor service, Kaseya agent service, and network daemons. Designed and deployed Azure infrastructure using Azure Bicep (IaC) for GSA Fortigate Resource Groups, including VMs, network subnets, load balancers, and virtual servers across test and production environments, ensuring high availability and geographic resiliency. Implemented and managed Azure Backup, Log Analytics, and network configurations (internal subnets, firewalls) for GSA Dev and GSA Test Resource Groups, optimizing resource deployment in primary and secondary zones for disaster recovery.. Tools and Dashboards PRTG Network Monitor: For comprehensive network monitoring and alerting. Forti Manager & FortiGate: For firewall visibility and management. Meraki Dashboards: For managing switches (MS120 & MS250) across 55 sites. Azure Portal: For managing resources like VMs, resource groups, storage accounts, backup (Commvault), enterprise applications, web apps, and PaaS environments (Boomi, Yardi, Entrata, RealPage, production, & test). Auvik: For network visibility and management. Azure Monitor: For monitoring Azure data centers and services. WMI Tools: For monitoring Windows servers and workstations. CrowdStrike Falcon: For endpoint protection and monitoring. Kaseya VSA: For IT management and monitoring. Nasuni and Commvault: For backup and recovery monitoring. Sophos firewall 2100 XG administration (LAN, WAN, Rule & policy, NAT MASQ Configuration & monitoring LAN & WAN Traffic, Ubuntu (ADDS, DNS, Samba) AD Server integration with Sophos UTM.

Network Security Engineer with 16.6 Year of Experience. Good experience with multiple Firewall Vendor and Network devices.

Objective To pursue a challenging and rewarding position which would utilize and further enhance my technical skills and Innovative potential, by the means of working in team synergy and with brilliant minds of similar vision, for the purpose of making significant contributions to the growth of the society. Professional Synopsis * Dynamic professional with 17 years of experience in Network and Security Design, Deployment, and Support, including end-toend project management, on-site/off-site infrastructure planning, feasibility analysis, detailed design, and advanced troubleshooting for complex routing and switching environments. * Currently serving as Manager - Service Transition and Head - Network & Competency Centre at SITA, managing mission-critical global partner accounts. * Formerly worked as Technical Architect - Network & Security Operations with NEC, and Senior Specialist - Network Transition