Mechanical Operations & Engineering Manager - Washington, DC Security Clearance

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.

Clearance Requirement:
Applicants selected will be subject to a government security investigation and must meet eligibility requirements, including U.S. Citizenship, for access to classified information; HSPD-12 & Secret Clearance required.

The Mechanical Operations & Engineering Manager serves as the site's lead mechanical subject matter expert (SME), responsible for ensuring the performance, reliability, and technical integrity of mechanical systems. This role supports mission-critical and facility operations through advanced troubleshooting, system optimization, and technical oversight of vendors across HVAC, chilled water, steam, and hydronic systems. Operating within established Work Control, Quality Control (QC), and standard operating frameworks, this position is execution-focused and reports directly to site leadership without independent program or operational authority.

Clearance Requirement:
Applicants selected will be subject to a government security investigation and must meet eligibility requirements, including U.S. Citizenship, for access to classified information; HSPD-12 & Secret Clearance required.

Serve as the primary SME for chilled water systems, cooling towers, condenser water systems, steam and hydronic systems, and HVAC equipment including AHUs, FCUs, VAVs, and CRAH units. Evaluate system performance, identify deficiencies, and assess operational risks while supporting system stabilization and performance improvement efforts.

Lead the diagnosis of complex mechanical and controls-related issues, including chiller and cooling tower instability, hydronic flow imbalances, and BAS sequence misalignment. Develop and document root cause analyses, corrective actions, and preventative recommendations to improve system reliability.

Provide technical oversight of mechanical vendors and contractors by reviewing and validating proposals, scopes of work, field findings, and installation quality. Ensure all vendor activities align with site standards, specifications, and operational objectives.

Review and validate sequences of operation (SOO) for mechanical systems, identify discrepancies between design intent and actual performance, and coordinate with controls/BAS teams to optimize system functionality.

Analyze recurring failures and performance trends to recommend enhancements to preventative maintenance strategies, intervals, and scope. Support the development of reliability-centered maintenance practices and contribute to System Operational Risk Assessments (SORA), Facility Condition Index (FCI)…