Network Engineer - TS/SCI w/Poly

General Dynamics Information Technology • Annapolis Junction, MD

6d • $110,500 - $149,500 • Onsite

About The Position

Join a team where your expertise directly protects critical missions and makes a national impact. As a Network Engineer Senior, you’ll design, support, and optimize an enterprise-scale network that keeps thousands of users and systems connected, secure, and mission-ready every day.

Requirements

• Bachelor’s degree (BA/BS)
• 5+ years of hands-on experience supporting enterprise networks using Cisco and Juniper technologies
• Strong knowledge of Layer 2/3 networking and core routing technologies, including: OSPF, BGP, EIGRP VLANs, VRFs, QoS
• Experience configuring and managing load balancers (F5, Citrix, or equivalent)
• Experience with boundary security devices, such as firewalls or network access control appliances
• Proficiency with Forward Networks or similar digital twin/virtual network simulation tools
• Solid understanding of Software-Defined Networking (SDN) concepts and architectures
• Proven ability to work independently and manage priorities in a complex, dynamic environment
• Strong awareness of network security best practices, compliance standards, and patch management processes
• Excellent written and verbal communication skills, with the ability to clearly explain technical concepts to both technical and non-technical stakeholders
• Willingness to participate in an on-call rotation to support a 24/7 mission environment
• TS/SCI with Polygraph clearance
• U.S. citizenship required
• 8570-compliant with Security+ (or the ability to obtain if not already held)

Nice To Haves

• Professional network certifications such as CCNP, JNCIP, CCIE, or JNCIE
• Experience supporting high-availability, mission-critical environments
• Familiarity with scripting and automation tools (e.g., Python, Ansible)
• Background in government or other highly regulated enterprise environments

Responsibilities

• Provide day-to-day operational support, troubleshooting, and maintenance for a large-scale Juniper and Cisco switching infrastructure.
• Configure and maintain load balancers and boundary security devices (e.g., firewalls, edge routers) to ensure resilient and secure connectivity.
• Use Forward Networks to build virtual replicas (“digital twins”) of the production network, simulate and validate SDN code changes before they go live, and document and visualize the physical and logical network topology.
• Safeguard network integrity, performance, and security across a distributed environment supporting several hundred thousand endpoints.
• Monitor and respond to network events and incidents, leading root cause analysis and driving permanent fixes.
• Maintain accurate network diagrams, configurations, and documentation in line with industry and organizational standards.
• Ensure alignment with security policies, regulatory requirements, and best practices.
• Participate in planning and executing network upgrades, migrations, and performance optimizations.
• Collaborate closely with cybersecurity, infrastructure, and application teams to deliver end-to-end solutions.
• Operate with a high degree of autonomy, proactively identifying, diagnosing, and resolving complex network issues.

Benefits

• Variety of medical plan options, some with Health Savings Accounts
• Dental plan options
• Vision plan
• 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match
• Full flex work weeks where possible
• Variety of paid time off plans, including vacation, sick and personal time, holidays
• Paid parental, military, bereavement and jury duty leave
• Short and long-term disability benefits
• Life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance

What This Job Offers

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