Sr. Enterprise Network Engineer
Astrion
- Columbia, South Carolina, United States
- Columbia, South Carolina, United States
About
Senior Enterprise Network Engineer
LOCATION: Columbia, MD (Onsite)
JOB STATUS: Full-time
CLEARANCE: Active Top Secret (TS/SCI Preferred)
TRAVEL: As Needed
SALARY RANGE: $150k - $170k
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.
REQUIRED QUALIFICATIONS / SKILLS
Active Top Secret security clearance.
TS/SCI preferred
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
KEY COMPETENCIES
Advanced network design and troubleshooting
Security hardening and compliance enforcement
Strong analytical and problem-solving abilities
Excellent communication and documentation skills
Ability to operate in high-security, mission-critical environments
PREFERRED QUALIFICATIONS / SKILLS
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)
RESPONSIBILITIES
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
Languages
- English
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