Systems / Network Administrator

KBR is seeking an advanced Systems/Network Administrator with an active U.S. Top Secret clearance (SCI eligible) to maintain and support IT infrastructure across Marine Corps installations. The role involves installing, configuring, and managing servers, network devices, Active Directory, and security measures, with 30% travel and full on‑site work. The incumbent will serve as a subject matter expert, ensure compliance with DoD security policies, and provide advanced troubleshooting support in a fast‑paced, mission‑critical environment.