Senior Network Engineer

Senior Network EngineerReston, VAAbout MetronMetron 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 & ImplementationConfigure, 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 SupportAdminister 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 & EscalationCoordinate 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, VAEligible to obtain and maintain a U.S. security clearanceWilling and able to work in classified, secure, or compliance-bounded environmentsAble to support occasional after-hours and weekend maintenance or emergency response7+ years of hands-on enterprise networking experience5+ years supporting Cisco enterprise networking platformsExperience with switching, routing, VLANs, wireless, VPNs, DNS, firewalls, and network security operationsExperience troubleshooting site-to-site VPNs, routing, latency, packet loss, DNS, and service-availability issuesExperience supporting secure, classified, regulated, government, defense, or security-controlled infrastructureExperience following formal change-management, testing, backout, and documentation practicesAbility to coordinate across network, systems, cybersecurity, helpdesk, vendor, and program teamsPreferred Qualifications:Active U.S. security clearanceExperience with Cisco ISE, TACACS+, RADIUS, or network access-control policy administrationExperience with TACLANE, encrypted transport, secure enclave networking, or air-gapped environmentsExperience with Cisco firewall/security platforms or enterprise firewall policy troubleshootingExperience with Active Directory, Entra ID, ADFS, SSO, claims, UPN/email hygiene, or ServiceNow identity integrationsWorking familiarity with virtualization or platform environments such as VMware, Nutanix, Hyper-V, Linux, storage, or backup systemsExperience in defense contracting, government programs, CMMC, NIST 800-171, or other compliance-driven environmentPosition Location: Reston, VA (the selected individual will be expected to work onsite in the Reston, VA office)Perks and BenefitsMedical, Dental and Vision InsuranceAccompanying FSA and HSA optionsAdditional Voluntary BenefitsPaid Time Off9 Observed Holidays and 2 Floating HolidaysPaid Parental LeaveMilitary LeaveTuition ReimbursementProfessional Development ReimbursementAnnual Salary ReviewsProfit Sharing401(k) Traditional and Roth OptionsGym and Fitness ReimbursementEmployee Assistance ProgramEmployee Referral ProgramMetron is an Equal Employment Opportunity (EEO) employer. It is the policy of the company to provide equal employment opportunities to all qualified applicants without regard to race, color, religious, sex, sexual orientation, gender identity, national origin, age, protected veteran or disabled status, or genetic information.VEVRAA Federal Contractor