Role : Level 3 Field Service Operations Engineer, Network and FortinetLocation: Burlington City , NJJOB DESCRIPTIONLevel 3 Field Service Operations Engineer, Network and Fortinet1. Position Summary
The Level 3 Field Service Operations Engineer is responsible for advanced technical support of Burlington s network infrastructure, with a primary focus on Fortinet FortiGate firewalls, SD-WAN and associated network devices.
The engineer will act as the senior technical escalation point for complex incidents, onsite troubleshooting, hardware replacement, configuration recovery and post-change validation. The role requires close coordination with Field Services, Network Operations, Network Security, NOC, service providers, carriers and Fortinet technical support.
Burlington s documented environment includes FortiGate devices at retail stores and FortiGate devices operating as SD-WAN hubs. FortiManager and FortiAnalyzer provide centralized Fortinet management and orchestration.
2. Key Roles and Responsibilities2.1 FortiGate and Fortinet Device Management- Provide Level 3 operational support for Fortinet FortiGate firewalls and SD-WAN devices.
- Troubleshoot FortiGate hardware, interfaces, routing, policies, NAT, IPsec VPN and SD-WAN issues.
- Monitor and validate device health, interface status, routing tables, VPN tunnels, CPU, memory and connectivity.
- Support FortiGate device onboarding, replacement, recovery and RMA activities.
- Perform pre-change and post-change device-health validation.
- Support approved FortiOS firmware upgrades and device-lifecycle activities.
- Troubleshoot FortiGate communication and synchronization with FortiManager.
- Use FortiAnalyzer for approved log analysis and incident troubleshooting.
- Coordinate complex product issues with Fortinet TAC.
2.2 Incident and Problem Management- Own complex network incidents escalated by L1, L2, NOC or Field Services.
- Perform end-to-end fault isolation across FortiGate, WAN, LAN, SD-WAN, LTE, routing and IPsec connectivity.
- Lead technical troubleshooting during critical network incidents.
- Analyze logs, configurations and network behavior to identify probable root causes.
- Provide technical findings for Root Cause Analysis and Problem Management.
- Identify recurring issues and recommend permanent corrective actions.
- Maintain complete troubleshooting and resolution details in ServiceNow.
2.3 Field Engineer and Smart-Hands Support- Provide real-time technical instructions to onsite field engineers.
- Guide onsite resources through:
- Device and port identification
- Power and status checks
- Cabling and interface validation
- Console connectivity
- WAN and LAN cable replacement
- FortiGate installation and replacement
- Device boot and recovery checks
- Coordinate the deployment and use of approved spare equipment.
- Complete required remote configuration after onsite replacement.
- Validate device reachability, network connectivity and service restoration.
- Remain engaged until repair and post-restoration testing are completed.
2.4 Firewall and Security Operations- Troubleshoot firewall policies, NAT, traffic flows and deny/permit behavior.
- Support approved firewall-rule implementation and validation.
- Maintain compliance with security, access-control and change-management requirements.
- Support syslog-forwarding and security-monitoring investigations.
- Escalate suspected security incidents or unauthorized access to the appropriate security team.
- Ensure that production changes are made only through approved tickets and change records.
2.5 Change, Deployment and Maintenance- Participate in planned network changes and maintenance windows.
- Review implementation, validation and rollback plans.
- Perform pre-change health checks and readiness validation.
- Support FortiGate deployment, replacement, migration and firmware activities.
- Execute approved configuration changes through authorized tools.
- Complete post-change connectivity and service validation.
- Support network activities for new stores, relocations, refreshes and closures.
- Update change records with results, evidence, exceptions and final status.
2.6 Documentation and Knowledge Management- Maintain network runbooks, troubleshooting guides, SOPs and knowledge articles.
- Record detailed technical actions and evidence in ServiceNow.
- Update asset, serial-number and configuration-item information.
- Document known errors, recurring issues and field observations.
- Provide knowledge transfer to L1, L2 and Field Service teams.
- Recommend opportunities for automation and operational improvement.
3. Required Technical Skills- Strong hands-on experience with Fortinet FortiGate NGFW and FortiOS.
- Experience with FortiManager and FortiAnalyzer.
- Strong understanding of:
- Fortinet SD-WAN
- Firewall policies and NAT
- IPsec VPN
- BGP and static routing
- VLANs and trunking
- TCP/IP, DNS and DHCP
- DIA, broadband and LTE connectivity
- High-availability concepts
- Experience troubleshooting LAN, WAN and network-security issues.
- Ability to diagnose issues using FortiGate CLI, logs and centralized management tools.
- Experience with hardware replacement, RMA and remote field support.
- Working knowledge of ServiceNow Incident, Problem and Change Management.
- Familiarity with Cisco switching and Cradlepoint or equivalent LTE devices.
4. Required Experience and Qualifications- Bachelor s degree, diploma or equivalent qualification in Information Technology, Telecommunications, Electronics or a related field.
- Recommended six to ten years of network or network-security experience.
- Recommended four or more years of hands-on Fortinet/FortiGate experience.
- Experience supporting large, distributed or multi-site network environments.
- Demonstrated Level 3 troubleshooting experience involving firewalls, routing, VPN and SD-WAN.
- Experience coordinating remote field engineers, carriers and OEM support teams.
- Ability to work during approved maintenance windows, including nights and weekends.
- Ability to travel to customer sites when required.
5. Preferred Certifications- Fortinet Certified Professional, FCP, or equivalent Fortinet certification
- Fortinet Certified Solution Specialist, FCSS
- Cisco Certified Network Associate, CCNA
- Cisco Certified Network Professional, CCNP Enterprise
- ITIL 4 Foundation
- CompTIA Network+ or Security+
6. Key Competencies- Advanced network fault isolation
- Fortinet firewall and SD-WAN troubleshooting
- Critical-incident ownership
- Clear technical communication
- Field-engineer coordination
- Customer and service orientation
- Accurate technical documentation
- Change and security discipline
- Root-cause analysis
- Vendor and carrier coordination
- Ability to work effectively under pressure
7. Key Performance Measures- Incident response and service-restoration performance
- Mean time to restore service
- First-time-fix rate
- Repeat-incident reduction
- Successful FortiGate replacement and recovery
- Change success rate
- ServiceNow documentation quality
- Asset and CMDB accuracy
- Compliance with security and change procedures
- Knowledge transfer to L1, L2 and Field Service teams