Senior Network Engineer — Secure Core VPN & LAN/WAN

Society of Defense Financial Management; Laurel (MD); On-site; USD 90,000 - 130,000; Full time

Job summary

ManTech in Laurel, MD is seeking a motivated Network Engineer to join our team delivering enterprise infrastructure for national defense missions. You will support cross-domain networks, VPNs, and encryption devices while contributing to planning, deployment, and QA for upgrades.

The role requires extensive Cisco experience (Nexus/Catalyst), PKI/IPSEC/VPN environments, and CCNA/CCNP/CCSP designations. A TS/SCI with Poly clearance is required.

Qualifications

• Bachelor’s degree with 12+ years of relevant experience.
• Experience provisioning and sustaining secure PKI/IPSEC/VPN environments.
• CCNA/CCNP/CCSP/CCD P certifications preferred.
• Able to understand routing protocols and IPSEC tunneling.

Responsibilities

• Support customer networks including VPNs and cross-domain solutions.
• Perform planning, deployment and QA for network upgrades.
• Draft diagrams and schematics for infrastructure planning.
• Design and maintain LAN/WAN equipment across Cisco Nexus/Catalyst devices.
• Implement VLANs, Inter-VLAN routing, trunking and WAN/LAN port aggregation.

Skills

Network engineering

PKI/VPN security

Routing protocols

Cross-domain solutions

Technical leadership

Problem solving

Education

Bachelor’s degree +12 years

Associate’s degree +15 years

High school diploma +20 years

Tools

Cisco Nexus/Catalyst equipment

Taclane 175 encryption devices

MPLS/VPLS, OSPF, EIGRP configurations

Job description

ManTech in Laurel, MD is seeking a motivated Network Engineer to join our team delivering enterprise infrastructure for national defense missions. You will support cross-domain networks, VPNs, and encryption devices while contributing to planning, deployment, and QA for upgrades.

The role requires extensive Cisco experience (Nexus/Catalyst), PKI/IPSEC/VPN environments, and CCNA/CCNP/CCSP designations. A TS/SCI with Poly clearance is required.