Mission-Critical DoD Network Engineer (Top Secret)

SyMec LLC; Phoenixville (Chester County); On-site; USD 115,000 - 187,000; Full time

Benefits offered by this job

Health Insurance

401(k) with company match

3 weeks paid Vacation

1 week Paid Sick

7 Paid Holidays

LifeTime Fitness discount

Job summary

SyMec LLC is seeking a Network Engineer to design, deploy, and sustain enterprise and tactical networks across classified environments. You will work with cybersecurity, systems, and operations teams to ensure availability, performance, and DoD-compliance.

The role requires active DoD Top Secret clearance, a relevant degree or equivalent experience, and hands-on experience with router/switch, VPNs, firewalls, and Type 1 encryption devices. Competitive salary and benefits are offered.

Qualifications

• Active DoD Top Secret clearance.
• Bachelor's degree in Computer Science, Information Technology, Network Engineering, or related field, or equivalent experience (typically 4+ additional years).
• 3–5+ years of hands-on network engineering experience in enterprise or DoD environments.
• DoD 8140 (8570) compliant certification at IAT Level II or higher (e.g., Security+ CE) at time of hire.
• CCNA or equivalent networking certification.
• Strong command of Cisco IOS/IOS-XE/NX-OS configuration and troubleshooting.
• Solid understanding of TCP/IP, routing and switching fundamentals, and network security principles.
• Experience applying DISA STIGs to network devices.
• U.S. citizenship (required for clearance).

Responsibilities

• Design, configure, and maintain routing, switching, and wireless infrastructure across LAN, WAN, and data center environments.
• Implement and manage routing protocols including BGP, OSPF, and EIGRP, plus VLANs, QoS, and multicast.
• Configure and maintain firewalls, VPNs, and network access control solutions.
• Deploy and manage Type 1 encryption devices for classified network connectivity.
• Harden network devices in line with DISA STIGs and remediate vulnerability scan findings.
• Support RMF and ATO activities by producing network diagrams, configuration baselines, and security documentation.
• Monitor network performance and availability; troubleshoot outages and lead root cause analysis.
• Plan and carry out network upgrades, migrations, and technology refreshes with minimal mission impact.
• Support network integration for new systems and program deliveries, including lab and field testing.
• Maintain accurate network documentation, including topology diagrams, IP address plans, and change records.

Skills

DoD Top Secret clearance

Cisco IOS/IOS-XE/NX-OS

TCP/IP fundamentals

Network security principles

DISA STIGs knowledge

US citizenship for clearance

Education

Bachelor's degree or equivalent experience in CS/IT/Networking

Job description

SyMec LLC is seeking a Network Engineer to design, deploy, and sustain enterprise and tactical networks across classified environments. You will work with cybersecurity, systems, and operations teams to ensure availability, performance, and DoD-compliance.

The role requires active DoD Top Secret clearance, a relevant degree or equivalent experience, and hands-on experience with router/switch, VPNs, firewalls, and Type 1 encryption devices. Competitive salary and benefits are offered.