Mechanical Engineer

Overview

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.

Why Join Us?

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.

In the role of Mechanical Engineer 3 – Power Generation & Utility Infrastructure
, you will help deliver distributed and central utility‑scale energy solutions that support M.C. Dean’s expansion in the power sector. Working within a multidisciplinary EPC/design‑build environment, you will develop mechanical designs for behind‑the‑meter and grid‑connected generation facilities and associated balance‑of‑plant systems for mission‑critical, industrial, and utility‑facing applications. Core outputs include engineering studies, design packages, equipment specifications, vendor coordination, construction support, and commissioning documentation that enable safe, reliable, and maintainable project delivery.

This position is intended for an experienced mechanical engineer who can independently execute work streams of moderate complexity and contribute technical leadership on larger power and utility infrastructure programs. You are expected to apply sound engineering judgment, identify and mitigate technical risks, coordinate effectively across engineering, procurement, construction, and operations stakeholders, and develop practical solutions with limited to moderate oversight.

You will have access to senior technical leaders, project delivery teams, and the tools required to succeed, including relevant codes, standards, and engineering software. Success in this role requires curiosity, accountability, and the ability to translate technical requirements into designs that support constructability, operability, and long‑term asset performance.

• Develop and maintain mechanical design standards, specifications, and criteria for power generation and utility infrastructure projects, including the following systems:
  • Reciprocating internal combustion engine (RICE), combustion turbine, and combined‑cycle generation systems
  • Fuel gas systems, including pressure regulation, conditioning, metering, and custody transfer
  • Thermal management and heat rejection systems, including air‑cooled and water‑cooled equipment, heat exchangers, and balance‑of‑plant auxiliaries
  • High‑pressure gas, steam, condensate, and process piping systems
  • Auxiliary systems including fire protection interfaces, compressed air, drains, vents, and mechanical support systems
  • Mechanical inputs to plant control systems, including startup and shutdown sequences, interlocks, trip logic, and PLC/DCS integration requirements
• Perform site assessments, engineering calculations, equipment sizing and selection, and system layouts for proposals and project execution.
• Lead or support mechanical design development from concept through issued‑for‑construction documentation, including drawings, specifications, datasheets, and technical bid evaluations.
• Coordinate natural gas utility interconnections, including pipeline tie‑ins, pressure class assessments, redundancy strategies, and interface management with interstate and intrastate gas providers.
• Evaluate generation system performance, including thermal modeling, cycle analysis, startup characteristics, and operating constraints, to support project development and design optimization.
• Design and evaluate cooling and thermal rejection systems with…