Must have an active DOE Q or DOD Top Secret clearance. Active, meaning the individual granted a clearance is briefed and currently occupies a position for which the clearance is required. Leidos has an immediate need for a UK Program Support Engineer supporting the NNSA United Kingdom (UK) Program. This individual will provide technical, program and project management support to the UK Team Lead as well as liaison with other Defense Programs (DP), National Nuclear Security Administration (NNSA)