Network Engineer, Classified Networks & Infrastructure
Overview
Own the operations of the Laboratory's enterprise classified networks, supporting mission-critical systems in Lexington, MA. You will join a team of network engineers managing a complex infrastructure of routers, switches, firewalls, and servers in a secure, classified environment. This 36-month contract offers the chance to work with Cisco and Juniper technologies, ensuring high availability and security. You will collaborate with cross-functional teams and grow your expertise in network security and troubleshooting, with a direct impact on national security missions.
What You'll Do8
- 1Configure and maintain Cisco and Juniper routers and switches to ensure optimal performance and security.
- 2Manage firewall rules and policies using Palo Alto and Fortinet devices to protect classified network boundaries.
- 3Deploy and maintain network monitoring tools such as SolarWinds and Nagios to track system health and performance.
- 4Troubleshoot network issues, performing root cause analysis with Wireshark and resolving incidents within SLA.
- 5Implement network changes following ITIL change management processes, ensuring minimal disruption to operations.
- 6Collaborate with the security team to enforce NIST 800-53 controls and maintain compliance.
- 7Document network configurations and maintain up-to-date diagrams using Visio.
- 8Support the integration of new network segments and the expansion of existing infrastructure.
Requirements9
- 15+ years of hands-on experience in network engineering, with Cisco or Juniper certifications (CCNA, CCNP, JNCIA) preferred.
- 2Active security clearance (Secret or Top Secret) is required.
- 3Proficiency in configuring and troubleshooting BGP, OSPF, and MPLS protocols.
- 4Hands-on experience with Cisco and Juniper routers and switches in an enterprise environment.
- 5Experience with firewall management, specifically Palo Alto and Fortinet devices.
- 6Strong knowledge of network security principles, including VLANs, VPNs, and ACLs.
- 7Familiarity with network monitoring tools like SolarWinds or Nagios.
- 8Excellent problem-solving skills and ability to work in a fast-paced, mission-critical environment.
- 9Bachelor's degree in Computer Science, Information Technology, or related field, or equivalent experience.
Salary Insight
$80 - $85k per year
Location
Required Skills
Similar open positions
Explore active roles that match your skills and interests.
REC_RTX_Ext_Gateway
VerifiedNetwork Operations Section Manager, Classified Networks
You will lead a regional team of 20+ networking professionals delivering secure, reliable network services for classified environments at Raytheon. Reporting to the Network Operations Lead, you own the full team and the Local and Wide Area Networks they support, with accountability for operational delivery, technical direction, and strategic roadmap execution. Your team spans California, Colorado, and Indiana, and you will coordinate with matrixed resources to meet mission-critical commitments. This role demands a leader who builds trust, drives disciplined execution, and partners with cybersecurity and engineering to modernize infrastructure.
GD Information Technology, Inc.
VerifiedNetwork Engineer (TS/Q Clearance) - Cisco - Denver
You will own network design, implementation, and troubleshooting for NNSA mission-critical operations at a large-scale Cisco environment. You will shape LAN, MAN, and WAN infrastructure with BGP, OSPF, and VXLAN protocols, ensuring security and reliability. Collaborate with vendors and internal teams to resolve complex issues and drive performance. This role stands out through direct support of Department of Energy programs and a focus on advanced Cisco technologies.
Apex Systems
VerifiedSenior Network System Administrator, Government & Enterprise Networking
Own the design, delivery, and security of physical Combined Test Bed (CTB) network environments at Naval Information Warfare Center Pacific (NIWC Pacific). Integrate, test, troubleshoot, and maintain enterprise network infrastructure for mission-critical operations. Collaborate with cross-functional teams to optimize performance and ensure compliance. Stand out by bridging engineering depth with operational excellence in a defense-focused setting.
Saalex
VerifiedNetwork Administrator V
Saalex Corporation seeks Network Administrator V to lead enterprise network infrastructure across global Live Virtual Constructive environments in Tidewater VA and San Diego CA. This contingent position offers competitive compensation and benefits while supporting Navy operations. The role requires expert leadership in network architecture and security compliance.
Saalex
VerifiedNetwork Engineer II
You will design, implement, and maintain secure, scalable network architectures for global Live Virtual Constructive (LVC) environments supporting the Navy. With 3–5 years of experience and CCNA or CCNP certifications, you will integrate enterprise and tactical network systems, focusing on routing, switching, firewalls, and VPNs. You will join a team of engineers in San Diego and Tidewater, collaborating on network optimization and security compliance. This role includes opportunities for clearance upgrade and career development in a veteran-owned company.
Enabled Intelligence
VerifiedClassified Infrastructure Systems Engineer - Washington DC
The Classified Infrastructure Systems Engineer will lead on-site support for Enabled Intelligence systems across classified and unclassified networks. This role drives technical excellence while fostering collaboration within a diverse team dedicated to advancing AI solutions.