DC 1st Class Engineer - TS​/SCI Poly

Join to apply for the DC 1st Class Engineer 3 - TS/SCI with Poly role at M.C. Dean, Inc.

M.C. Dean is Building Intelligence. We design, build, operate, and maintain cyber-physical solutions for mission-critical facilities, secure environments, complex infrastructure, and global enterprises. Our capabilities include electrical, electronic security, telecommunications, life safety, automation and controls, audio visual, and IT systems. Headquartered in Tysons, Virginia, with over 5,800 professionals, we engineer and deploy automated, secure, and resilient power and technology systems.

Our team is inspired by how engineering and innovation enhance customer outcomes, improve lives, and change the world. We value agility, expertise, and trust.

Active TS/SCI Polygraph clearance is required. Applicants will undergo a security investigation and must meet eligibility requirements, including U.S. Citizenship. A DC 1st Class Engineering License is mandatory.

• Maintenance and Operation: Safely operate, maintain, and monitor boilers, HVAC, refrigeration, and stationary equipment, including chillers, boilers, pumps, control systems, air handlers, cooling towers, heat exchangers, VAVs, and VFDs. Demonstrate knowledge of chiller plant operations, blueprint reading, and building air systems. Respond to service calls for gas-fired boilers, chillers, AHUs, fire pumps, generators, UPS, BAS, and fire alarm systems.
• Routine Inspections: Conduct inspections to identify issues, ensure compliance with safety standards, and document findings using the site CMMS system.
• Troubleshooting: Diagnose system malfunctions, identify root causes, and implement solutions.
• Documentation & Compliance: Keep detailed records of inspections, maintenance, repairs, and ensure adherence to regulations.
• Collaboration & Emergency Response: Coordinate with teams and act as first responder during emergencies, implementing safety procedures.
• Continuous Learning: Stay updated with industry trends, attend workshops, and training.

• Minimum 10+ years of relevant experience with a high school diploma or GED.
• Active TS/SCI Poly clearance required.
• DC 1st Class Engineering License required.

• Experience with boilers, HVAC, refrigeration, and building systems.
• Strong problem-solving and communication skills.
• Ability to interpret technical documentation and understand building mechanical and electrical systems.

• Competitive salary
• Medical, dental, vision, life, and disability insurance
• Paid time off, tuition reimbursement, 401k, military reserve pay offset, paid maternity leave

• Ability to lift up to 50 pounds, work at heights up to 60 feet, and perform physical tasks regularly.
• Good vision, hearing, and communication skills.

USD $45.40 - USD $72.60 per hour.