L3Harris Technologies is seeking an experienced Information Technology Senior Systems Administrator or Mid-to-Senior Level Systems Engineer to join our highly skilled and diverse team. This position is 100% on-site at a customer location and requires an active TS/SCI clearance with CI Polygraph, a CompTIA Security+ CE (or equivalent DoD 8570 IAT Level II certification), and relevant experience in both systems administration and systems engineering. The ideal candidate will be capable of supporting and maintaining mission-critical IT systems in a fast-paced, secure environment. Networking experience, including knowledge of LAN/WAN infrastructure, switches, routers, and firewalls, is highly desirable. As a Senior Systems Administrator or Mid-Senior Level Systems Engineer, you will work with a diverse, energetic, and highly collaborative technical team to identify and resolve issues with production operational systems in a secure environment. In this role, you will also contribute to the development and deployment of leading-edge technologies that deliver mission-critical solutions for our customers.