Senior Principal Network Engineer – Mission Networks

ASD; San Antonio (TX); On-site; USD 160,000 - 210,000; Full time

Job summary

Northrop Grumman is seeking an Engineer Network 3 in San Antonio to design, implement, and support launch execution networks across classified and unclassified enclaves. You will lead network architecture, tuning, and RMF-aligned protections in collaboration with cyber teams.

The role requires hands-on experience with routing, switching, and enterprise network services in mission-critical environments, plus active DoD clearance eligibility. On-site in San Antonio, TX.

Qualifications

• Bachelor’s degree in a Science, Technology, Engineering, or Mathematics (STEM) discipline from an accredited institution.

Responsibilities

• Designs and plans network communications systems with detailed schematics for architecture and hardware/software selection.
• Lead end-to-end testing of network designs, validate configurations, and monitor performance for reliability and security.
• Develop and execute implementation plans for network upgrades, migrations, and enhancements with rollback procedures.
• Operate core network services (DNS, DHCP, NTP, AAA) across segmented enclaves and ensure secure baselines.
• Collaborate with ISSMs/ISSOs and cyber teams to align designs with RMF/ATO requirements and cybersecurity standards.
• Maintain and tune network security controls (firewalls, VPNs, ACLs) in mission-critical environments.

Skills

Routing & switching

RMF/ATO compliance

DNS/DHCP/NTP/AAA

Firewalls/IDS/IPS

Network automation (Ansible/Python)

VMware NSX / Cisco

NOC/SOC operations

ISSMs/ISSOs coordination

Education

Bachelor’s degree in STEM

Tools

Cisco IOS

VMware NSX

NMS/SIEM tools

Network automation tooling

Job description

Northrop Grumman is seeking an Engineer Network 3 in San Antonio to design, implement, and support launch execution networks across classified and unclassified enclaves. You will lead network architecture, tuning, and RMF-aligned protections in collaboration with cyber teams.

The role requires hands-on experience with routing, switching, and enterprise network services in mission-critical environments, plus active DoD clearance eligibility. On-site in San Antonio, TX.