SysAdmin - Multi-User Linux/Windows, Secret Clearance

Lockheed Martin is seeking an experienced System Administrator to manage multi-user Linux and Windows environments in a classified/air-gapped setting. The role involves coordinating with network teams, managing accounts, and ensuring security and backups. The candidate should have 5+ years of sysadmin experience, DoD 8572 certification, and a SECRET clearance with eligibility for TS/SCI. Expect on-site work with potential scheduling flexibility.