Senior Network Engineer (SEAS)

S enior Network Engineer (SEAS)
Springfield, VA
Full-Time | On-site | Immediate Hire

Join Synertex LLC and bring your expertise to a mission that matters. We're looking for a dynamic Senior Network Engineer to join our Systems Engineering and Architecture Services (SEAS) Team in support of a critical national security customer. If you're passionate about modernizing and sustaining complex network infrastructures and thrive in a fast-paced, technically challenging environment-this opportunity is for you.
RESPONSIBILITIES

• Translate stakeholder and Government requirements into enterprise network solutions, upgrades, and modifications.
• Lead the deployment, maintenance, and optimization of Cisco, Juniper, Riverbed, and SolarWinds-based solutions.
• Serve as the highest internal escalation tier for the Networking O&M team, providing advanced troubleshooting and Root Cause Analysis (RCA).
• Produce and maintain accurate documentation including as-built network diagrams, performance plans, and secure system lifecycle planning.
• Collaborate with the IT Architecture and Engineering (A&E) team to research and evaluate new technologies for modernizing network infrastructure.
• Support global ROBO and data center network operations with approximately 15% annual travel.
• Mentor junior team members and provide on-the-job training (OJT) to elevate team capabilities.

REQUIREMENTS

• 7+ years of progressive experience in network engineering across enterprise IT systems
• Cisco Certified Network Professional (CCNP) Data Center
• Associate's Degree OR active certifications (CompTIA Security+ ce, GSEC, or SSCP)
• 5+ years of hands-on experience with Cisco Routing and Switching technologies (e.g., BGP, OSPF, QoS, VRF)
• Experience with secure encrypted devices (e.g., Taclanes), Next-Gen Firewalls, and network-based security protocols
• Strong background in high availability, load balancing, COOP, and secure processing environments (DISA STIGs/SRGs)
• Demonstrated experience working in globally dispersed teams and delivering against mission-critical deadlines
• Active DoD TS/SCI clearance with the ability to obtain/maintain a CI Polygraph

PREFERRED QUALIFICATIONS

• CCNP Routing and Switching, CCNP Collaboration, or CCNP Security
• Technical certifications in Juniper, Riverbed, and other enterprise solutions
• Experience with Cisco ASA, Unified Communications Manager (CUCM), and TelePresence systems
• Familiarity with Riverbed Steelhead, SolarWinds NCM, and Juniper Firewalls
• Experience with Cisco ACI and Data Center Network Manager (DCNM) for Software Defined Networking (SDN)
• Ability to mentor and lead junior engineers while supporting the CSWF Network Operations Specialist role (SECNAV M-5239.2 Intermediate Level)

Join a mission-driven team advancing global network operations for national security. Apply today and become part of Synertex LLC's legacy of engineering innovation and technical excellence.