Senior Linux Systems Administrator

Title:

Senior Linux Systems Administrator At KBR, we deliver science, technology and engineering solutions to governments and companies around the world. KBR employs approximately 37,000 people worldwide with customers in more than 85 countries and operations in over 28 countries. KBR is proud to work with its customers across the globe to provide technology, value-added services, and long-term operations and maintenance services to ensure consistent delivery with predictable results.

Trinzic is the future independent company to be created through the planned spin-off of KBR's Mission Technology Solutions business, expected in January 2027. Our people work at the frontier of what is possible, delivering solutions in challenging environments and advancing some of the world's highest-priority national security and space missions.

Backed by decades of mission success, deep expertise, and trusted partnerships, Trinzic will launch as a global organization with more than 18,000 employees supporting customers around the world. Join us at a defining moment and help shape the future of a company built to tackle complex challenges and make a meaningful impact.

Candidates who join KBR's Mission Technology Solutions business before the spin-off will transition to Trinzic when the separation is complete and will not need to reapply for employment.

Program Summary KBR’s Missile, Aviation, and Ground Systems (MAGS) division delivers mission engineering solutions for critical U.S. Army programs, specializing in aviation and ground systems, integrated air and missile defense, and threat and target systems. As a trusted partner of the U.S. Department of War, MAGS provides innovative, technology-driven solutions to enhance national security. With a global presence and a strong ethical framework, KBR ensures secure, effective, and mission-ready capabilities worldwide.

Job Summary Join a team supporting critical mission systems focused on missile defense, aviation, engineering, modeling and simulation, and software development environments.

We are seeking a Senior Linux Systems Administrator to serve as a technical leader for Red Hat Enterprise Linux (RHEL) platforms supporting both classified and unclassified environments. This position combines hands-on system administration, automation, cybersecurity hardening, and infrastructure modernization efforts across a diverse Linux enterprise.

This is an opportunity to work on challenging technical problems in air-gapped and enterprise environments while helping shape the future architecture and automation strategy of our Linux platforms.

Key Responsibilities

• Design, build, administer, and troubleshoot enterprise RHEL servers and workstations.
• Lead Linux standardization, automation, and modernization initiatives.
• Develop and maintain secure Linux baselines and hardened system images.
• Implement and maintain configuration management and automation using Ansible and scripting technologies.
• Support Linux integration with enterprise identity services including Active Directory, LDAP, Kerberos, and PKI authentication.
• Manage patching, repository management, and lifecycle operations across connected and disconnected environments.
• Perform performance analysis, troubleshooting, and root cause investigations for complex infrastructure issues.
• Support cybersecurity compliance activities including STIG implementation, vulnerability remediation, and RMF requirements.
• Mentor junior administrators and serve as the technical escalation point for advanced Linux issues.
• Collaborate with cybersecurity, infrastructure, and program teams to deliver secure and reliable mission systems.

Basic Qualifications

• U.S. Citizenship.
• Active Secret clearance or ability to obtain and maintain one.
• 5+ years of experience administering Linux systems in an enterprise environment.
• Experience with Red Hat Enterprise Linux (RHEL).
• Experience with Linux security hardening and system administration best practices.
• Experience with automation, scripting, or configuration management tools such as Ansible, Bash, or Python.
• Experience troubleshooting Linux operating systems, networking, storage, and authentication issues.
• Excellent customer service to include written and verbal communication skills.

Preferred Qualifications

• DISA STIG implementation and compliance.
• Red Hat Satellite.
• Identity Management (IdM), SSSD, Kerberos, LDAP, or Active Directory integration.
• RMF, NIST 800-53, ACAS/Nessus, or cybersecurity compliance activities.
• Ansible Automation Platform, AWX, or Tower.
• Containers and virtualization technologies.
• Engineering or software development environments.
• Air-gapped or classified DoD systems.
• RHCSA, RHCE, Security+, or similar industry certifications.

Compensation: $120,000 - 160,000. The salary range posted is based on the national average. The offered rate will be based on the selected candidate’s location, knowledge, skills, abilities, and/or experience, contract affordability, and in consideration of internal parity.

Belong, Connect and Grow at KBR

At KBR, we are passionate about our people and our Zero Harm culture. These inform all that we do and are at the heart of our commitment to, and ongoing journey toward being a People First company. That commitment is central to our team of team’s philosophy and fosters an environment where everyone can Belong, Connect and Grow. We Deliver – Together.

KBR is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, disability, sex, sexual orientation, gender identity or expression, age, national origin, veteran status, genetic information, union status and/or beliefs, or any other characteristic protected by federal, state, or local law.