Senior Network Engineer - TS/SCI Clearance | 24x7 Enterprise Network

SAIC; Suffolk (VA); On-site; USD 120,000 - 160,000; Full time

Job summary

SAIC is seeking 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, diagnosing and resolving the most complex network issues while guiding Tier 2 personnel and shaping long-term architecture.

The engineer will support end-to-end visibility, advanced troubleshooting, change control, and

Qualifications

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

Responsibilities

• Serve as Tier 3 escalation point for complex outages and root-cause investigations.
• Analyze network performance, routing behavior, and security events with packet-level tools.
• Lead cross-functional troubleshooting with network, systems, cybersecurity, and vendor teams.
• Design and enhance network architecture including routing, switching, firewalls, VPN, SD-WAN, and Spine-Leaf environments.
• Provide guidance 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.

Skills

OSPF/BGP routing

L2/L3 design (Spine-Leaf)

Packet analysis & visibility

Arista switches

Palo Alto firewalls

TACACS+ on Cisco ISE

IPSEC tunnels

TCP/IP & subnetting

Root-cause analysis leadership

Education

Bachelor of science in Computer Science / IT or related field

Tools

Gigamon

NetScout

Arista

Palo Alto

Cisco ISE TACACS+

Job description

SAIC is seeking 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, diagnosing and resolving the most complex network issues while guiding Tier 2 personnel and shaping long-term architecture.

The engineer will support end-to-end visibility, advanced troubleshooting, change control, and