**Description**

**Mechanical Engineer (TS/SCI Required)**

Leidos is seeking a motivated **Mechanical Engineer** to support critical national security missions in Reston, Virginia. This role focuses on the assessment, reverse engineering, and characterization of complex above-ground and subterranean facilities located in denied-access environments.

The successful candidate will apply mechanical engineering principles to analyze facility designs, spatial layouts, operational workflows, and supporting infrastructure to determine functional capabilities and mission relevance. You will evaluate facility systems, model critical infrastructure, identify vulnerabilities, and contribute technical insights that support complex intelligence and defense initiatives.

This position is ideal for an engineer who enjoys solving challenging problems in situations where complete information is rarely available. The ideal candidate combines curiosity, analytical think...