Lead Classified Systems Administrator

KBR is seeking a Lead Classified Systems Administrator to serve as the technical lead for a large, complex classified infrastructure with a focus on Red Hat Enterprise Linux administration, security, and modernization. This role involves maintaining, optimizing, and troubleshooting mission-critical systems while guiding infrastructure improvements and mentoring junior administrators. The position requires collaboration with cybersecurity, network, and engineering teams to deliver reliable and secure solutions in a highly regulated environment.