Mechanical Engineer - TS​/SCI Poly

About M.C. Dean

M.C. Dean is Building Intelligence. We design, build, operate, and maintain cyber‑physical solutions for the nation’s most mission‑critical facilities, secure environments, complex infrastructure, and global enterprises. With over 7,000 employees, our capabilities span electrical, electronic security, telecommunications, life safety, automation and controls, audiovisual, and IT systems. Headquarters in Tysons, Virginia, M.C. Dean delivers resilient, secure, and innovative power and technology solutions through engineering expertise and smart systems integration.

Our people are passionate about engineering innovation that improves lives and drives impactful change. Guided by our core values—agility, expertise, and trust—we foster a collaborative and forward‑thinking work environment. At M.C. Dean, we are committed to building the next generation of technical leaders in electrical, engineering, and cybersecurity industries.

Applicants selected will be subject to a government security investigation and must meet eligibility requirements, including U.S. Citizenship, for access to classified information; minimum TS/SCI with Polygraph required.

Applicant must successfully meet all customer‑imposed requirements. Such requirements may include, but are not limited to, completion of a customer‑provided weapons qualification program, successful completion of customer‑directed medical screening, and fulfillment of any additional training, certifications, or evaluations as required by the customer.

• Perform calculations, evaluations, equipment selection, equipment specification, system design, and system layout for project proposal and contract execution.
• Determine or assist in determining project engineering scopes of work, deadlines, and budget, and complete support within agreed deadlines and budget.
• Produce construction contract drawings and specifications consistent with contract requirements and regulations, applicable industrial codes and standards.
• Address any mechanical design, fabrication, construction, and commissioning issues.
• Develop system sequence of operations, compliance matrices, and other project support documentation.
• Participate in Pre‑Installation Testing and Checkout (PITCO) processes including system programming, integration testing, and equipment build‑outs.
• Participate in and ensure successful project construction, start‑up, and commissioning.
• Document design work via AutoCAD and REVIT in 2D and 3D platforms.
• Provide support for construction activities, including responses to Requests for Information, review of project equipment submittals, and technical support of operations management.
• Research, prototype, and develop emerging technologies to implement the latest and best‑in‑class capabilities to meet the customer’s emerging needs.
• Keep senior staff informed of important and relevant service/design decisions and that the objectives of the company and the client are achieved.
• Manage your time effectively and support multiple projects concurrently.

• Bachelor’s Degree in Mechanical Engineering from an accredited engineering program.
• 2+ years of relevant experience in design, testing, and commissioning of building power systems.
• Applicants selected will be subject to a government security investigation and must meet eligibility requirements, including U.S. Citizenship, for access to classified information; minimum TS/SCI with Polygraph required.
• Strong application knowledge of ASHRAE Handbook and Standards.
• Possess a strong working knowledge of mechanical, HVAC, and cooling systems, including applicable codes and industry standards.
• Excellent oral and written communication, interpersonal, problem‑solving and analytical skills.

• Fundamentals of Engineering certification or Professional Engineer license.
• Proficiency with the latest version of AutoCAD and Revit experience.
• Strong communication, coordination, and documentation skills.
• Demonstrated time management and organization skills working independently to meet deadlines and quality objectives.

• Competitive salary
• Medical, dental, vision, life, and disability insurance
• Paid time off
• Tuition reimbursement
• 401(k) retirement plan
• Military Reserve pay offset
• Paid maternity leave