Maintenance Mechanic

Donohoe Companies Inc., The

3d•Onsite

About The Position

Complete Building Services (CBS) is seeking a Maintenance Mechanic for its operations in Fairfax, VA. As a division of The Donohoe Companies, Inc., CBS focuses on building operations and facilities maintenance for commercial office and health-care facilities. The Maintenance Mechanic will be responsible for the overall maintenance, repair, and operational efficiency of these facilities and their systems. This role requires a strong understanding of HVAC, plumbing, basic electrical, and general mechanical systems. The successful candidate will perform preventative maintenance, diagnose complex issues across multiple trades, and ensure a safe, code-compliant, and comfortable environment for building occupants.

Requirements

Broad understanding of commercial plumbing, basic electrical systems, and the refrigeration cycle.
Experience using digital control systems to monitor and adjust building environments.
Ability to read and interpret technical specifications, blueprints, and wiring diagrams.
Proficiency with basic plumbing and HVAC diagnostic tools, including multimeters, manifold gauges, and leak detectors.
Hands-on experience with drain cleaning equipment (snakes and cameras) and pipe repair methods.
Strict adherence to Lockout/Tagout (LOTO) procedures, confined space entry, and fall protection protocols.
Proper handling and disposal of refrigerants in accordance with federal law.
Ability to rapidly diagnose complex issues across different utility systems under pressure.
Capacity to lift 50+ lbs, climb ladders, and work in confined spaces, mechanical rooms, or extreme weather conditions.
High School Diploma or GED required.
3 to 5+ years of experience in facility maintenance, commercial plumbing, or commercial HVAC.
Valid driver’s license with a clean driving record.

Nice To Haves

Completion of an apprenticeship program or technical degree preferred.
Siemens Desigo BAS preferred.
Experience with brazing, soldering, and threading pipe is highly preferred.
EPA Section 608 Certification (Universal CFC).
HVAC or Journeyman License.

Responsibilities

Perform routine inspections, filter changes, belt replacements, and system tuning on air handlers, condensers, chillers, and boilers.
Troubleshoot mechanical malfunctions and repair/replace components like compressors, motors, and thermostats.
Maintain and repair commercial plumbing systems, including sinks, toilets, and associated piping.
Identify leaks or clogs and perform necessary repairs using Pro-Press, PVC, copper, and cast-iron methods.
Operate drain cleaning equipment (e.g., K-50 snake) and plumbing cameras for accurate diagnostics.
Read wiring diagrams and utilize multimeters to test voltage, amperage, and continuity.
Troubleshoot basic electrical circuits and replace faulty mechanical parts.
Conduct daily facility rounds and system testing to ensure peak energy efficiency and prevent equipment failure.
Test pipe or tubing joints for leaks.
Interact with Building Management Systems (BMS/BAS) Siemens Desigo to monitor the building climate remotely and respond to alarms.
Maintain detailed logs of all work orders performed, parts used, and system performance metrics.
Adhere strictly to OSHA safety standards, local building codes, and EPA environmental regulations.
Work with CMMS system to open and close work orders daily.