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Senior Network Engineer

Legacy Consulting Services , LLC

Posted today

Job Requirements

Aberdeen Proving Ground, MD
Top Secret/SCI CI Polygraph
Mid Level Career (5+ yrs experience)
$120,000 - $130,000

Job Description

The Opportunity

Join a mission-focused team supporting secure, classified network environments for national security programs. This role is hands-on and focused on CSfC implementations, VPN architectures, and enterprise network engineering across complex, high-assurance environments.

What You’ll Do
Design, configure, and troubleshoot secure network infrastructures (LAN/WAN)
Implement and support CSfC solutions and secure communications
Build and maintain VPNs (IPSec, IKEv2, site-to-site, client VPN)
Configure Cisco routers/switches, Palo Alto & SonicWall firewalls
Support Aruba wireless (ClearPass, controllers, APs)
Work within VMware environments (ESXi, vSphere)
Enforce STIG compliance and system hardening
Utilize tools like SolarWinds, NetFlow, SEM for monitoring
Maintain network documentation, diagrams, and configs

What You Bring
Active TS/SCI CI Polygraph
8+ years of network engineering experience (DoD or enterprise)
Strong experience with:
Cisco (ASR, ISR, Catalyst, Nexus)
Firewalls/VPNs (Palo Alto, Cisco ASA, SonicWall)
Routing: BGP, OSPF, EIGRP
Hands-on experience with IPSec VPNs & secure network design
Solid understanding of network security & STIGs

Nice to Have
CSfC experience
F5 Load Balancers
PKI / certificates (EJBCA, RHCS)
TACLANE or encryption devices
RHEL / Windows Server exposure
Certs (Preferred)
CCNP (Enterprise) or higher
Security+ CE
CCNA

Why Join
Direct impact on national security missions
Work on cutting-edge secure network systems
High-visibility role with strong technical ownership
Apply Today

If you're a hands-on engineer who thrives in secure, high-performance environments, we’d love to connect.
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About Us
Legacy Consulting Services, LLC is a small business specializing in Command, Control, Communications, Computers, Cyber, Intelligence, Surveillance and Reconnaissance (C5ISR) services by providing complex cyber security and secure communication solutions. Our capabilities include the requirements analysis, definition design, development, integration and deployment of systems that support national leadership and our warfighters. Established in 2017, LCS supports a variety of customers in the National Capital Region including Aberdeen Proving Grounds, Fort Meade and beyond. Our size is our strength! Given LCS’s small size we can ensure we keep focus on the things that matter the most; our employees, our customers and their families! LCS believes that one of the keys to our success is a balanced work life experience, focused on ensuring that employees can turn their focus to their lives when they leave for the day, and are able to go on vacation without worrying about the office calling.

Legacy Consulting Services , LLC Jobs


Clearance Level
Top Secret/SCI