Mechanical Safety Engineer 2

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 9,000 employees, our capabilities span electrical, electronic security, telecommunications, life safety, automation and controls, audiovisual, and IT systems. Headquartered in Tysons, Virginia, M.C. Dean delivers resilient, secure, and innovative power and technology solutions through engineering expertise and smart systems integration.

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 9,000 employees, our capabilities span electrical, electronic security, telecommunications, life safety, automation and controls, audiovisual, and IT systems. Headquartered 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 innovative engineering that improves lives and drives impactful change. Guided by our core values—agility, expertise, and trust—we foster a collaborative, forward-thinking work environment. At M.C. Dean, we are committed to developing the next generation of technical leaders across our electrical, mechanical, engineering, and technology disciplines.

The Mechanical Systems Safety Engineer is the mechanical counterpart to M.C. Dean's electrical Energy Marshal role, focused on overseeing and managing the safe isolation of mechanical systems during construction, commissioning, maintenance, and operations at mission-critical data centers. This is not a design role, and you will not personally place locks or perform isolations — but you must be capable and knowledgeable enough to do so yourself.

You will draw on prior experience with mechanical design documents, piping systems, and commissioning to read and interpret P&IDs, specifications, and sequence-of-operations, and translate them into safe, real-world isolation practices in the field.

You will support the site's Mechanical Energy Marshal in administering the day-to-day mechanical LOTO and hazardous energy control program, with a growth path toward owning that program yourself. Our standard for success is simple to state and hard to achieve: zero uncontrolled releases of energy. That means overseeing and verifying that every isolation is executed correctly by the person doing the work, not just documented on a permit.

• Serve as an on-site resource for mechanical energy isolation — chilled water, condenser water, industrial/domestic water, compressed air, pneumatic, hydraulic, steam/hot water, and stored mechanical (spring, gravity, pressure) energy — supporting 24x7x365 mission-critical data center operations.
• Ensure safe working conditions have been established by reviewing documentation (procedures, job hazard analyses, and permits) and auditing the mechanical isolation program for construction, commissioning, maintenance, and operations activities.
• Work with construction and commissioning teams to ensure safe working conditions to properly test and validate the installation, operation, and performance of mechanical systems.
• Coordinate mechanical isolations/de-isolations with electrical Energy Marshals and other stakeholders where systems are interdependent (e.g., pump and fan motor LOTO, controls interlocks).
• Oversee and verify that absence-of-energy checks and two-person (pilot-and-copilot) verification are properly executed by field personnel before and during mechanical isolation activities.
• Reinforce execution-level ownership in the field — the person physically performing an isolation owns getting it right, and your role is to ensure that accountability isn't diluted by relying on a policy document or permit alone.
• Lead pre-isolation and startup kickoff meetings prior to first-of-kind (FoK) startup of…