Senior Network Engineer - Top-Secret Cleared ONLY

RCG•Washington, DC

15h•$140,000 - $150,000•Onsite

About The Position

RCG is seeking a Senior Network Engineer to support enterprise network operations, architecture, modernization, and troubleshooting for a large federal agency in Washington, DC. This is a hands-on senior engineering role requiring independent ownership of complex network issues, review and validation of proposed changes, mentorship of other engineers, and technical leadership across routing, switching, WAN, firewalls, secure transport, and classified network operations. The position is 100% on-site in Washington, DC, and requires an active Top Secret clearance with SCI eligibility. Occasional after-hours support may be required for maintenance windows and operational activities. Employment is contingent upon successful completion of customer onboarding requirements.

Requirements

Active Top Secret clearance with SCI eligibility.
Bachelor's degree in Computer Science, Information Systems, Engineering, or a related technical discipline.
At least 8 years of hands-on network engineering experience in enterprise, federal, DoD, or similarly complex environments.
Active CCNP Enterprise, CCNP Security, or equivalent advanced networking certification.
Strong experience with Cisco routing and switching, enterprise LAN/WAN environments, routing protocols, high-availability technologies, and multi-site network troubleshooting.
Experience troubleshooting routed, switched, firewalled, and encrypted transport environments.
Experience supporting enterprise voice, video, and collaboration services.
Experience with change control, maintenance planning, configuration review, rollback procedures, and post-change validation.
Experience creating technical documentation, network diagrams, implementation plans, and operational procedures.
Experience supporting Cisco, Dell, Palo Alto, Juniper, or other enterprise networking platforms.
Strong analytical, troubleshooting, communication, and documentation skills.
Ability to work independently, exercise sound judgment, and mentor less-experienced engineers.
Willingness to work on-site in Washington, DC and provide occasional after-hours support for maintenance windows and operational activities.

Nice To Haves

Cisco CCIE, Cisco Specialist certifications, or other advanced networking certifications.
Experience supporting classified, Red/Black, TACLANE, HAIPE, or encrypted transport environments.
Experience with GRE, IPsec, secure WAN transport, multicast, and collaboration services.
Experience with Cisco ASA, Firepower, Cisco Nexus, and datacenter networking technologies.
Experience with SolarWinds, Wireshark, packet analysis, and enterprise monitoring tools.
Familiarity with cloud integration, network automation, and federal accreditation processes.

Responsibilities

Provide senior technical leadership for enterprise network operations, including routing, switching, firewalls, WAN transport, secure communications, and supporting infrastructure.
Troubleshoot complex network issues across Layers 1 through 7, including routing, switching, firewall policy, encrypted transport, and application or service connectivity.
Design, review, implement, and validate network changes involving routing, switching, firewall policies, secure transport, and modernization initiatives.
Support VOSIP, VTC, CUCM, and collaboration services, including network path validation, QoS considerations, multicast behavior, and secure communications requirements.
Participate in network architecture reviews, modernization efforts, and major infrastructure upgrades.
Lead maintenance-window activities, including implementation planning, rollback procedures, validation testing, and post-change reviews.
Develop and maintain network diagrams, as-built documentation, implementation plans, validation procedures, and operational runbooks.
Monitor network performance and troubleshoot issues using enterprise monitoring and diagnostic tools.
Collaborate with government stakeholders, security teams, ISSOs, vendors, and technical SMEs to support operations, compliance, and modernization efforts.
Mentor junior and mid-level engineers on troubleshooting, packet flow analysis, change management, and operational best practices.
Perform hands-on troubleshooting and physical connectivity validation when necessary.