Microsoft Exchange / System Administrator Location: Suitland, MD Clearance Required: Active TS/SCI Leidos is seeking an experienced Microsoft Exchange / System Administrator to support critical mission operations at the Office of Naval Intelligence in Suitland, MD. This role is more than just IT-it's about enabling operations that shape national security. If you're ready to work with cutting-edge systems and make a real-world difference, we want you on our team. Primary Responsibilities: Admin