Leidos is seeking a Senior Transmission Line Engineer to join our Engineering & Design team supporting Energy & Utilities clients. In this mission-driven, collaborative role, you will lead overhead and underground transmission line projects from concept through construction, performing detailed design, analysis, and QA/QC to meet NESC, IEEE, and utility standards. You'll coordinate closely with multidisciplinary teams, mentor junior staff, and engage directly with clients on grid modernization and critical infrastructure initiatives. Leidos offers competitive pay, comprehensive benefits, flexible hybrid work options, and robust professional development opportunities on high-impact national security and energy projects. Responsibilities Lead transmission line design projects from conceptual engineering through detailed design and construction support Perform structural and electrical design and analysis of overhead and underground transmission lines Prepare and review engineering drawings, technical specifications, and calculations Ensure designs comply with NESC, ANSI, IEEE, and utility/client standards Coordinate with civil, substation, and protection & controls teams to deliver integrated solutions Provide technical guidance, mentoring, and quality reviews for junior engineers and designers Support cost estimates, proposals, and project schedules for utility and grid modernization projects Interface with utility clients, vendors, and stakeholders to resolve technical issues Support field investigations, line routing, and constructability reviews Drive continuous improvement, safety, and innovation aligned with Leidos' mission and values Required Skills Transmission line design PTI / PLS-CADD or similar software Structural analysis of lattice and tubular structures NESC and IEEE standards Overhead and underground line routing Foundation and pole design Line modeling and loading calculations Construction package development Project engineering and coordination Auto CAD or Micro Station