Overview Senior Network Engineer LOCATION: Columbia, MD (Onsite)

JOB STATUS: Full-time

CLEARANCE: Active Top Secret (TS/SCI Preferred)

TRAVEL: As Needed

SALARY RANGE: $145k - $165k

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 adecuado 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

📌 Sr. Network Engineer (Colombia)
🏢 Astrion
📍 Colombia