Leidos is seeking an experienced Facilities Mechanical Engineer to lead the design, maintenance, and configuration management of building mechanical systems across mission-critical sites. This role demands deep technical expertise, creative problem-solving, and leadership in projects involving air handlers, chillers, boilers, pumping systems, and other complex mechanical infrastructure. The ideal candidate will have a strong background in managing and troubleshooting mechanical and control systems in dynamic environments.

Primary Responsibilities

• Lead mechanical design and development efforts from concept through production.
• Create and review AutoCAD design documents, submittals, and site-specific specifications.
• Collaborate with cross-functional teams—including electrical, systems, software, and manufacturing—to ensure mechanical designs meet all functional and environmental requirements.
• Conduct engineering analyses to validate mechanical designs under operational conditions.
• Develop and maintain comprehensive site documentation.
• Troubleshoot design and maintenance issues; recommend and implement corrective actions.
• Ensure compliance with applicable building codes, energy standards, and industry regulations.

Basic Qualifications

• Current TS/SCI security clearance and the ability to pass a polygraph.
• Bachelor’s degree in Mechanical Engineering with 8–12 years of relevant experience, or Master’s degree with 6–10 years. Additional experience may be considered in lieu of degree.
• Minimum of 8 years of experience in mechanical systems design, including HVAC and plumbing, for commercial, industrial, or government facilities.
• Strong working knowledge of building codes, energy standards, and regulatory frameworks.
• Proven ability to perform heating and cooling load calculations, ductwork sizing/layout, piping system design, and equipment selection.
• Demonstrated expertise in CAD tools such as AutoCAD.
• Experience developing mechanical systems for commercial HVAC applications.
• Ability to effectively communicate with stakeholders, contractors, and regulatory authorities.
• Familiarity with Facility Management Control Systems (FMCS).
• Active Professional Engineer (PE) license or ability to obtain licensure within one year of hire.

Preferred Qualifications

• Experience troubleshooting and repairing control system
• A current polygraph