Linux Systems Administrator

Support the modernization and deployment of the Department of Defense's premier Joint Command and Control system by serving in a unique hybrid role that combines Linux System Administration, Test Engineering, and Fielding Engineering. Work directly with warfighters and operational users around the globe to install, test, deploy, troubleshoot, and support mission-critical GCCS-J capabilities that provide real-time situational awareness to commanders across the Joint Force. A Day in the Life - What you'll do

• Install, configure, administer, and maintain Linux-based GCCS-J environments supporting development, testing, training, and operational deployments.
• Execute system administration activities including account management, software installation, patching, troubleshooting, system monitoring, and performance optimization.
• Install and configure GCCS-J software suites and supporting applications within complex multi-system environments.
• Develop, execute, and document comprehensive test plans, test procedures, and test results supporting GCCS-J software releases and modernization efforts.
• Identify, document, reproduce, and track software defects while collaborating closely with development teams to facilitate issue resolution.
• Support system integration, functional testing, regression testing, and user acceptance testing activities.
• Serve as a Fielding Engineer supporting customer installations, upgrades, demonstrations, training events, and operational deployments.
• Travel to customer locations throughout the United States and internationally to support GCCS-J fielding, sustainment, and user support activities.
• Deliver technical demonstrations and end-user training sessions for military operators, administrators, and government stakeholders.
• Act as the primary point of contact for customer-reported issues, providing technical troubleshooting, issue resolution, and escalation management.
• Lead technical investigations involving software, infrastructure, network, and system integration issues impacting operational capabilities.
• Coordinate with geographically dispersed software development, cybersecurity, systems engineering, and support teams to resolve complex technical challenges.
• Advise government customers on system configuration, integration strategies, baseline upgrades, and adoption of new GCCS-J capabilities.
• Support modernization initiatives focused on cloud-native architectures, microservices, enhanced data integration, and Joint All-Domain Command and Control (JADC2) objectives.
• Maintain technical documentation, installation guides, training materials, and customer support artifacts to support successful field operations.

• Bachelor's degree in Computer Science, Information Technology, Cybersecurity, Engineering, or a related technical discipline; equivalent military or industry experience may be considered.
• Experience administering Linux-based operating systems within enterprise or mission-critical environments.
• CompTIA Security+ certification or ability to obtain prior to start date.
• Experience installing, configuring, troubleshooting, and maintaining Linux systems and applications.
• Strong troubleshooting and problem-solving skills across operating systems, applications, and enterprise computing environments.
• Ability to develop and execute test procedures while documenting technical findings and software defects.
• Strong written and verbal communication skills with the ability to support both technical and non-technical stakeholders.
• Ability and willingness to travel CONUS and OCONUS up to 25% or more in support of customer fielding and mission requirements.
• Ability to work independently while collaborating within multidisciplinary engineering and operational teams.
• Active Secret security clearance or Interim Secret clearance with the ability to maintain clearance requirements.
• Ability to obtain and maintain a TS/SCI clearance.

Preferred Qualifications

• Experience administering Red Hat Enterprise Linux (RHEL) 8 environments.
• Experience supporting GCCS-J, Joint Command and Control systems, or other DoD mission command platforms.
• Experience supporting military operations, combatant commands, joint task forces, or operational headquarters environments.
• Knowledge of intelligence data flows, geospatial data formats, and military command and control architectures.
• Experience serving as a GCCS-J operator, administrator, trainer, or field support engineer.
• Experience supporting software testing, validation, verification, and release management activities.
• Familiarity with cloud-native architectures, containerized applications, and microservices-based environments.
• Experience providing customer training, technical demonstrations, and field support in operational environments.
• Understanding of JADC2 concepts and modern military command and control initiatives.
• Active TS/SCI security clearance.
• Military experience supporting command and control, intelligence, communications, or cyber operations.

• Premium Health, Dental & Vision Insurance
• 401(k) with 6% Company Match
• Flexible PTO & Work Schedule
• Education & Certification Reimbursement
• Support for Military Leave
• Work-Life Balance & Traditional Family Values

Caribou Thunder is a HUBZone-certified small business providing advanced technical and engineering services to the U.S. Department of War and its mission partners. 35+ states and 20+ countries. We've delivered trusted solutions for over two decades - strengthening national readiness across missions on land, undersea, in the air, and throughout LEO, MEO, GEO, and deep space. Why Caribou Thunder? TEAM THUNDER - Mission Focused. Delivery Proven. Ready to Serve. Employee Advocacy Mission Proven Global Reach Skilled Teams Modern Tools Empowering Culture Our engineers and innovators ensure capability from sea floor to space frontier - delivering on time, maintaining compliance, and performing with precision in high-consequence environments. We specialize in Engineering Services, Cybersecurity, Software Development, Modeling & Simulation, Digital Engineering, and Artificial Intelligence - disciplines powering the nation's most complex technical missions. Employee Advocacy + Benefits Our people are the heart of Caribou Thunder. We invest in their growth, flexibility, and well-being - knowing their success drives ours.