Client Facing Fortinet Network Engineer
2 days ago
New York
Job DescriptionWe are not looking for someone who just knows Fortinet. We are looking for someone who enjoys solving real problems, communicating clearly under pressure, and being a trusted partner to clients. At Square10, network engineers do more than implement and support. They help IT leaders make confident decisions. If you value variety, clean execution, and plain-English communication, this role is for you. Why Square10We help IT leaders cut through complexity and make confident decisions. Our clients—leading law firms and professional services organizations—stick with us because we deliver real business results and we’re great to work with. If you’re the person teams call in a crunch and you explain the hard stuff in plain English, you’ll fit right in. The RoleThis is a hands-on, client-facing network engineering role focused on Fortinet-centric environments. You will support our clients, lead troubleshooting efforts, and design and implement secure, scalable network solutions across multiple client environments. Some days you will be deep in FortiGate flow debugging. Other days you will be leading a migration, coordinating with a carrier, or walking a client through next steps. Variety is the norm. Clear thinking and steady execution are expected. What You’ll Do Operational Support and Troubleshooting • Triage, troubleshoot, and resolve network incidents across FortiGate, FortiSwitch, FortiAP, and WAN circuits from Level 1 through Level 3, • Perform structured root-cause analysis and deliver durable fixes rather than temporary workarounds, • Use advanced troubleshooting tools and techniques including:, • FortiGate flow debugging, packet capture, session and routing analysis, and log interpretation, • Wireshark and packet analysis to isolate Layer 3 through Layer 7 issues, • Coordinate with ISPs, carriers, and vendors and own support cases through resolution, • Communicate clearly with clients during incidents, including impact, status, and next stepsDesign, Projects, and Improvements, • Design, implement, and optimize Fortinet-based network and security solutions, • Lead or co-lead project delivery, including:, • Discovery and requirements gathering, • Solution recommendations aligned to client risk and business needs, • Implementation plans with validation and rollback steps, • As-built documentation and operational handoff, • Common project work includes:, • FortiGate deployments, migrations, and FortiOS upgrades, • SD-WAN design and rollout including SLA health checks, traffic steering, and failover behavior, • VPN design and troubleshooting including site-to-site IPsec and client VPNs, • Network segmentation and security posture improvements, • Enterprise wireless design and optimization with FortiAP Platform Ownership Across Clients, • FortiManager, • Maintain disciplined policy, object, and template workflows, • Enforce standards while accommodating client-specific requirements, • Ensure version control, audit readiness, and consistent change management, • FortiAnalyzer, • Ensure comprehensive logging, visibility, and retention, • Deliver reporting and operational insight that drives action, • FortiClient EMS, • Design and maintain endpoint, VPN, ZTNA, and posture configurations, • Ensure reliable deployment, upgrades, and version control, • Lifecycle, Switching, and Resiliency, • Define and maintain firmware standards for FortiGate, FortiSwitch, and FortiAP, • Plan and execute upgrades using documented runbooks and validation steps, • Design and troubleshoot campus LAN environments including:, • VLANs, trunks, STP or RSTP, LACP, LLDP, and PoE, • Support HA firewall environments, SSL inspection, and routing, • Static routing required; BGP experience preferred Documentation and Quality, • Own diagrams, IP plans, as-built documentation, and operational notes, • Contribute to reusable standards, templates, and runbooks across clients What You’ll Bring, • Five (5) or more years designing, implementing, and supporting enterprise network environments, • Strong hands-on experience with Fortinet technologies including FortiGate, FortiSwitch, and FortiAP, • Solid understanding of core networking and security principles including TCP/IP, routing, and switching, • Proven experience with FortiGate SD-WAN, VPN technologies, and high availability firewall environments, • Hands-on use of FortiManager and FortiAnalyzer in production environments, • Experience troubleshooting complex network issues efficiently and calmly, • Ability to design and support secure, scalable network architectures aligned to client needs, • A consulting mindset with the ability to own outcomes, manage priorities, and adapt across client environments, • Strong judgment in production environments with appropriate risk awareness and escalation, • Clear communicator who can explain technical decisions to both technical and non-technical audiences, • Disciplined executor who plans carefully, validates changes, and documents thoroughly, • Self-directed, organized, and accountable for results, • Enjoys client interaction and on-site work, • Continuous learner with interest in evolving network and security technologies Certifications, • Fortinet NSE 4 required or obtained within an agreed timeframe, • Fortinet NSE 7 preferred, • Willingness to maintain required certifications for Square10 and client engagements Nice-to-Haves, • Azure infrastructure experience, including FortiGate connectivity patterns, • Automation exposure such as FortiOS API or Ansible, • NAC or 802.1X experience, • Network monitoring and management tools