Senior Network Engineer

Mantis Security Corporation • Reston, VA

6d

About The Position

Mantis Security is a leading specialty firm of high caliber talent who specialize in Cyber Operations, Cyber Defense, Information Assurance, Software Development, DevSecOps, Security Engineering, and Cloud Engineering. We enable and protect our nation's most important IT assets and invest in the long-term career development of every employee! We are currently looking for the next Network Engineer to join our team of experts! This senior-level role emphasizes hands-on network engineering, operational sustainment, infrastructure modernization, and security compliance in complex government networks.

Requirements

• Bachelor’s degree in related field or equivalent experience.
• 10 years of network engineering or network operations experience.
• Hands-on experience with Cisco, Juniper, HP/Aruba, and Palo Alto technologies.
• Experience supporting secure enterprise network environments, including routing, transport, and network security technologies.
• Current DoD 8570 IAT II certification required.
• Current CCNA (or equivalent) required.
• Active TS/SCI with ability to obtain and maintain a CI Polygraph.

Nice To Haves

• CCNP, JNCIS/JNCIP, Palo Alto, Aruba, or similar advanced certifications preferred.
• Experience in DoD or Intelligence Community environments.
• Experience supporting TAC, NOC, transport engineering, or enterprise network operations.

Responsibilities

• Engineer and sustain LAN/WAN infrastructure across multi-vendor environments.
• Support advanced routing, switching, transport, and security technologies in support of enterprise operations.
• Troubleshoot network issues, perform fault isolation, support incident response, and maintain reliable network performance.
• Support traffic analysis, system monitoring, bandwidth optimization, and operational improvements across enterprise environments.
• Work across routing, switching, wireless, and security technologies to support day-to-day operations and long-term stability.
• Implement secure network designs aligned with DISA STIGs, ATO requirements, and government security policies.
• Support firewall, segmentation, and boundary protection efforts, including Palo Alto environments.
• Support technology refreshes, upgrades, migrations, and modernization initiatives.
• Develop architecture diagrams, technical documentation, and implementation support materials.
• Evaluate and recommend improvements to enhance network performance, resilience, and standardization.
• Execute network changes, maintenance activities, and approved engineering updates.
• Perform hands-on implementation and sustainment support for infrastructure enhancements and technology refreshes.
• Troubleshoot and resolve complex issues in coordination with operations teams and vendor support.
• Support operational readiness and continuity across enterprise and mission network environments.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior