Senior Lead Systems Engineer, National Security Mission

AT&T National Security seeks a Lead System Engineer for a deterministic, on-site role servicing a U.S. Government customer in the Washington DC metro area.

You will design, install, operate, and maintain mission systems across multi‑platform environments, collaborating with voice, network, and systems engineers to deliver customer-focused solutions. The role requires a TS/SCI with poly, strong Linux/Windows admin skills, and experience with security baselines, lifecycle management, and disaster