Senior Network Engineer

SAIC is looking for a Senior Network Engineer to provide Tier 3 advanced engineering support for a mission-critical naval enterprise transport network, ensuring continuous availability, resilience, and scalability. This role serves as the highest level of operational escalation, responsible for diagnosing and resolving the most complex network issues, guiding Tier 2 personnel, improving network reliability, and contributing to long-term architectural direction.

The engineer supports end-to-end network visibility, advanced troubleshooting, optimization, change control, and integration of new capabilities across a globally distributed environment.

This position is onsite in Suffolk, VA.

• Serve as the Tier 3 engineering escalation point, handling complex outages and deep root-cause investigations.
• Perform advanced analysis of network performance, routing behavior, and security events using packet-level tools.
• Lead cross-functional troubleshooting efforts with network, systems, cybersecurity, and vendor teams.
• Design, validate, and enhance network architecture including routing, switching, firewalls, VPN, SD-WAN, and Spine-Leaf environments.
• Provide guidance and oversight to Tier 2 teams, improving SOPs and operational efficiency.
• Oversee hardware/software upgrades, major configuration changes, and technology integration.
• Validate disaster recovery strategies and lead failover testing.
• Develop and enforce enterprise-level configuration and security standards.
• Conduct lab validation and simulation for new deployments and architectural changes.
• Support long-range capacity planning and modernization initiatives.
• Lead evaluation and adoption of emerging network technologies.
• Improve incident, problem, and change management processes including major incident reporting.

• Bachelor of science in Computer Science, Information Technology, or related field.
• Five (5) or more years supporting large-scale enterprise or service provider network infrastructure.
• Additional experience may substitute for degree.

• Active TS/SCI clearance.

• Expert-level proficiency with OSPF, BGP, route redistribution, and routing policy.
• Deep understanding of Layer 2/Layer 3 enterprise network design and Spine-Leaf architecture.
• Mastery of packet analysis and network visibility (Gigamon, Net Scout, etc.).
• Hands-on experience with Arista switches, Palo Alto firewalls, TACACS+ on Cisco ISE, and IPSEC tunnels.
• Strong troubleshooting capability for complex routing, QoS, multicast, and transport-layer issues.
• Advanced understanding of TCP/IP, subnetting, and protocol behavior.
• Proven ability to lead technical investigations and root-cause analysis.

• IAT Level II (Security+) required.
• CCNA/CCNP required; CCIE preferred.

• Experience with SVLAN configuration and management.
• Familiarity with Arista Cloud Vision Portal.
• Experience in high-availability, fully redundant enterprise environments.

• Must be able to support a 24x7 operational environment, including escalations, major outages, maintenance windows, and upgrade events.