Senior DoD Network Engineer - Secure, Cross-Domain, TS/SCI

Astrion; Columbia (MD); On-site; USD 145,000 - 165,000; Full time

Job summary

Astrion seeks a Senior Network Engineer to design, implement, secure, and maintain mission-critical network infrastructures supporting DoD/DoW environments, with deep Cisco and Fortinet expertise and RMF/C2C compliance.

The role requires active TS clearance, 8+ years in DoD/classified networks, and hands-on experience with DISA STIG, cross-domain architectures, and security fabrics across BGP/OSPF/EIGRP, VPNs, and related technologies.

Qualifications

• Active Top Secret clearance.
• 8+ years of DoD/classified network experience.
• Deep expertise in Cisco routing & switching (BGP, OSPF, EIGRP, VLANs, MPLS) and Fortinet solutions (FortiGate, FortiOS, VPNs, security fabric).
• Experience implementing and maintaining DISA STIG compliance.
• Hands-on experience with Cross Domain / C2C architectures and security controls.
• Strong understanding of RMF, DISA security requirements and accreditation processes, and DCSA standards.
• Active DoD 8140 (DoD 8570) compliant certifications (e.g., Security+ CE, CISSP).
• Experience with C2C requirements: network automation (Python, Ansible), Zero Trust, SIEM integration, NetFlow.

Responsibilities

• Design, implement, and maintain secure network architectures using Cisco and Fortinet solutions.
• Design, implement, and maintain 802.1x compliance platform.
• Engineer and support classified and unclassified network environments (e.g., DoD networks).
• Ensure compliance with DoD STIGs and cybersecurity policies.
• Implement and maintain CDS and C2C architectures.
• Perform network hardening, vulnerability remediation, and RMF-based monitoring.
• Develop and maintain network documentation, diagrams, SOPs, and security artifacts.
• Support ATO processes, including STIG checklists and risk assessments.
• Troubleshoot complex network and security issues across multi-vendor environments.
• Collaborate with cybersecurity and mission stakeholders for secure operations.
• Support audits, inspections, and compliance validation.

Skills

Network engineering

Security & compliance

Communication

Documentation

Analytical thinking

Education

Bachelor’s degree in Network Engineering or related field

Tools

Cisco routing & switching

Fortinet FortiGate

Python

Ansible

NetFlow

Job description

Astrion seeks a Senior Network Engineer to design, implement, secure, and maintain mission-critical network infrastructures supporting DoD/DoW environments, with deep Cisco and Fortinet expertise and RMF/C2C compliance.

The role requires active TS clearance, 8+ years in DoD/classified networks, and hands-on experience with DISA STIG, cross-domain architectures, and security fabrics across BGP/OSPF/EIGRP, VPNs, and related technologies.