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Astrion Logo Astrion · IT - Software Development

Senior Enterprise Network Engineer

United States, Columbia · Job Posted March 26, 2026
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Job Description

Astrion has an exciting opportunity for a highly experienced Senior Network Engineer to design, implement, secure, and maintain mission-critical network infrastructures supporting Department of Defense/Department of War (DoD/DoW) environments. The ideal candidate brings deep expertise in Cisco and Fortinet technologies, extensive experience operating within classified networks, and a proven track record of implementing and maintaining systems in compliance with Risk Management Framework (RMF), DoD STIG and Cross Domain / Comply-to-Connect (C2C) requirements.

Job Responsibility

  • Design, implement, and maintain secure network architectures using Cisco (routing/switching, ISE) and Fortinet (FortiGate) solutions
  • Design, implement, and maintain 802.1x compliance platform
  • Engineer and support classified and unclassified network environments (e.g., MDA CNET, NIPR, SIPR, JWICS as applicable)
  • Ensure compliance with DoD Security Technical Implementation Guides (STIGs) and cybersecurity policies
  • Implement and maintain Cross Domain Solutions (CDS) and Comply-to-Connect (C2C) architectures
  • Perform network hardening, vulnerability remediation, and continuous monitoring in accordance with RMF controls
  • Develop and maintain network documentation, diagrams, SOPs, and security artifacts
  • Support Authority to Operate (ATO) processes, including STIG checklists, POA&Ms, and risk assessments
  • Troubleshoot complex network and security issues across multi-vendor environments
  • Collaborate with cybersecurity, systems engineering, and mission stakeholders to ensure secure, reliable operations
  • Support audits, inspections, and compliance validation activities

Requirements

  • Active TS/TSCI security clearance (required)
  • Bachelor’s degree in Network Engineering, Computer Science, or related field (or equivalent experience)
  • 8+ years of experience in network engineering within Department of Defense/Department of War (DoD/DoW) or classified environments
  • Deep expertise in: Cisco routing & switching (BGP, OSPF, EIGRP, VLANs, MPLS)
  • Fortinet solutions (FortiGate, FortiOS, VPNs, security fabric)
  • Demonstrated experience implementing and maintaining DISA STIG compliance
  • Hands-on experience with C2C / Cross Domain architectures and security controls
  • Strong understanding of: RMF (Risk Management Framework)
  • DISA security requirements and accreditation processes
  • DCSA Accreditation Standards
  • Active DoD 8140 (formerly DoD 8570) compliant industry certification (e.g., Security+ CE, CISSP, etc.)
  • Active DoD 8140 (formerly DoD 8570) compliant environment certification (e.g., minimum Cisco CCNP)
  • Experience with C2C Requirements: Network automation (Python, Ansible)
  • Zero Trust architectures
  • SIEM integration and log analysis
  • NetFlow monitoring

Nice to have

  • CCIE (Enterprise or Security)
  • Fortinet NSE 4–7 certifications
  • Project Management Experience
  • Experience briefing Executive Leadership
  • Prior experience supporting Cross Domain Solutions (CDS) programs
  • Experience with cloud-based DoD environments (e.g., Azure Government, Azure Secret)

What we offer

  • Competitive salaries
  • Continuing education assistance
  • Professional development
  • Multiple healthcare benefits package options
  • 401K with employer matching
  • Competitive time off policy along with a federally recognized holiday schedule
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