Network System Administrator

Caribou Thunder; Colorado Springs (CO); On-site; USD 100,000 - 138,000; Full time

Job summary

Caribou Thunder is seeking a Mid-Level Network System Administrator to support DoD networks in Colorado Springs and Albuquerque. You will administer LAN/WAN, Cisco devices, and COMSEC, monitor security with SIEM tools, and maintain classified environments.

The role requires TS/SCI clearance, 3–5 years in secure environments, a STEM degree, IAT II and Security+, plus RMF compliance. On-site work and lifting up to 50 lbs are required.

Qualifications

• Active Top Secret/SCI clearance
• 3–5 years of network/system administration in DoD or secure environments
• Bachelor’s degree in a STEM field
• IAT Level II certification and CompTIA Security+
• Experience with LAN/WAN, Cisco routers/switches, IDS/IPS, Windows Server 2012R2/2016, Windows 10, RHEL 6.5
• Patch management using WSUS/YUM
• SIEM platforms and vulnerability scanning (LogRhythm, ACAS, Nessus, SCAP)
• DoD cybersecurity policy, frameworks, and RMF compliance
• Ability to lift up to 50 lbs and support on-site operations

Responsibilities

• Administer and optimize DoD network environments including LANs, WANs, Cisco gear, and COMSEC
• Monitor system performance with SIEM tools like LogRhythm, ACAS, Nessus for security and availability
• Support and maintain classified networks (PL2/PL3, SAP, SCI) and respond to incidents
• Collaborate with cyber, engineering and mission teams to architect secure, scalable solutions
• Maintain detailed technical documentation including SOPs, TTPs and ops guides
• Provide hands-on support to network infrastructure, including virtualization, patching, access controls

Skills

Network administration

DoD clearance

SIEM

Cisco networking

IAT Level II

CompTIA Security+ (SEC+)

RMF/DoD policy

Documentation

On-site support

Physical lifting 50 lbs

Education

Bachelor’s degree in STEM

Tools

VMware ESXi

Hyper-V

Xen

SQL Server 2012

Oracle

IIS

Tomcat

Apache

WSUS/YUM

BMC Footprints

RBAC

SELinux

AppArmor

BitLocker

Lumension

Job description

Network System Administrator – Mid-Level
Mid-Level | $100,000–$138,000 | Colorado Springs, CO and Albuquerque, NM | TS/SCI Clearance Required

Keep critical networks secure and mission-ready. Join a high-impact DoD program supporting national defense in Colorado Springs.

A Day in the Life – What You’ll Do

• Administer and optimize complex DoD network environments, including LANs, WANs, Cisco routers, switches, firewalls, and COMSEC integration
• Monitor and manage system and network performance using SIEM tools such as LogRhythm, ACAS, and Nessus, ensuring availability and cybersecurity compliance
• Support and maintain classified network environments, including PL2/PL3, SAP, and SCI networks, while responding to real-time incidents
• Collaborate with cyber, engineering, and mission teams to architect scalable, secure solutions that align with DoD policy and RMF frameworks
• Maintain detailed technical documentation including SOPs, TTPs, and system operations guides
• Provide hands‑on support to network infrastructure, including virtualization, patching, access controls, and monitoring platforms

Required Qualifications

• Active Top Secret/SCI security clearance
• 3–5 years of experience in network/system administration within DoD or other secure environments
• Bachelor’s degree in a STEM field (Science, Technology, Engineering, or Math)
• IAT Level II certification and active CompTIA Security+ (SEC+)
• Experience with:
  • LAN/WAN configuration and management
  • Cisco routers, switches, IDS/IPS firewalls
  • Windows Server 2012R2/2016, Windows 10, Red Hat Enterprise Linux 6.5
  • Patch management using WSUS/YUM
  • SIEM platforms and vulnerability scanning (e.g., LogRhythm, ACAS, Nessus, SCAP)
  • DoD cybersecurity policy, frameworks, and classified system compliance
  • Ability to lift up to 50 lbs and support on-site operations as required

Preferred Qualifications

• Experience supporting SAP and SCI environments
• Direct experience working with PL2/PL3 network configurations
• Knowledge of intrusion detection, incident response, and forensic analysis
• Hands‑on experience with:
  • Virtualization platforms such as VMware ESXi, Hyper-V, or Xen
  • Database and web servers including SQL Server 2012, Oracle, IIS, Tomcat, Apache
  • Security enhancements like RBAC, SE Linux, AppArmor, BitLocker, Lumension
  • Documentation/ticketing systems such as BMC Footprints
  • VOIP and VTC systems in secure environments

Who is Caribou Thunder?

Caribou Thunder is a premier Woman-Owned Small Business (WOSB) defense contractor supporting mission-critical programs across the Department of Defense and Intelligence Community. With a presence in over a dozen states and OCONUS, we specialize in software engineering, cybersecurity, systems integration, and satellite communications.

Why Caribou Thunder?

• Mission-Focused Impact: Support the secure networks that enable real-time national defense operations
• Growth-Driven Culture: Advance your skills in complex classified environments with clear paths for development
• Team-Centered Environment: Collaborate with elite cyber, infrastructure, and system engineering teams
• Stability and Clearance Readiness: Long-term DoD contracts and clearance-ready positions designed for career growth

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