Senior Network Engineer for Operations & Maintenance with Security Clearance

Our client, a leading federal systems integrator supporting a critical national defense mission, is seeking a Senior Network Engineer to provide Operations & Maintenance (O&M) support for a large-scale enterprise network environment. This role is ideal for an experienced network professional who thrives in mission-critical environments and possesses strong expertise in enterprise routing, switching, network troubleshooting, security compliance, and operational support. The selected candidate will work alongside architects, engineers, project managers, and operations teams to maintain and enhance a complex enterprise network infrastructure. Responsibilities

• Provide Tier III network operations and maintenance support for a large enterprise environment.
• Collaborate with network architects, engineers, project managers, and operations teams to troubleshoot and resolve complex networking issues.
• Participate in daily, weekly, and monthly operational reviews and maintenance activities.
• Analyze network anomalies and provide recommendations for corrective actions.
• Generate status reports and technical documentation supporting maintenance, upgrades, and vulnerability mitigation efforts.
• Support network outage bridge calls and serve as a technical escalation point during incidents.
• Create, update, and resolve incident tickets and work orders within an IT Service Management (ITSM) platform.
• Support engineering changes, system upgrades, and network modernization initiatives.
• Participate in an after-hours on-call rotation for critical network support. Required Qualifications
• 10+ years of professional work experience, with at least 5 years in network engineering or network operations.
• Previous experience in a technical leadership, lead engineer, or supervisory capacity.
• Active Secret Security Clearance.
• Active DoD 8570 IAT Level II certification (Security+ or equivalent).
• Strong knowledge of: LAN, WAN, VXLAN, and SDN environments, DNS, DHCP, HTTP, SMTP, SSL, TCP/UDP

Routing and switching protocols including BGP, OSPF, and STP, VPN, VRF, subnetting, voice and video networking, SD-WAN, SD-Access, Cisco ISE, and Cisco DNA Center (DNAC)

• Hands-on experience with Cisco networking platforms.
• Experience supporting Palo Alto firewalls.
• Familiarity with KG-175/TACLANE encryption devices.
• Experience identifying and remediating STIG compliance findings.
• Strong troubleshooting, documentation, and analytical skills.