Senior Network Engineer
About Metron Metron is an employee-owned company dedicated to delivering innovative solutions for the most challenging national security problems. For over 40 years, our principled approach to problem-solving has yielded creative solutions at the intersection of advanced mathematics, computer science, physics, and engineering. Our people are leaders in their technical fields and are passionate about solving challenging problems. We look for individuals who share this same passion and can apply their experience in real-world settings. Job Description: Our Reston, VA offices is seeking a Senior Network Engineer to support enterprise network operations, secure infrastructure, campus connectivity, and hands-on implementation across corporate and secure environments. This is an execution-focused senior technical role. The Senior Network Engineer will configure, troubleshoot, maintain, document, and improve network systems while working closely with network architecture, systems engineering, cybersecurity, vendors, and program teams. The ideal candidate is a hands-on senior network engineer with strong Cisco experience, disciplined change-management habits, and the ability to troubleshoot complex network, VPN, access-control, and secure-environment issues. Occasional after-hours/weekend maintenance and emergency response required. Key Responsibilities: Network Operations & Implementation Configure, maintain, and troubleshoot enterprise LAN, WAN, wireless, VPN, firewall, DNS, and secure network infrastructure. Execute network changes, switch cutovers, routing updates, firewall/security changes, and connectivity improvements. Support campus, data center, colocation, carrier, ISP, and secure-environment network operations. Cisco, VPN & Secure Network Support Administer Cisco switching, wireless, security, and related enterprise networking platforms. Troubleshoot site-to-site VPNs, routing issues, latency, packet loss, DNS behavior, firewall behavior, and service-connectivity problems. Support network access-control workflows, including Cisco ISE, TACACS+, RADIUS, and device-administration policies. Documentation, Change Management & Escalation Coordinate Cisco TAC, carrier, ISP, and vendor support cases through resolution. Follow formal change-management practices, including implementation plans, test plans, risk analysis, backout plans, and maintenance-window coordination. Maintain accurate network diagrams, change records, implementation notes, operational runbooks, and troubleshooting documentation. Required Qualifications: Able to work on-site in Reston, VA Eligible to obtain and maintain a U.S. security clearance Willing and able to work in classified, secure, or compliance-bounded environments ...