Under limited supervision, ensure safe and efficient operation of various types of mechanical systems to include, but not limited to: building, refrigeration, air conditioning, heating, plumbing, electrical, automation, medical gas and fire protection systems, and follows through to completion any required repairs maintenance and alterations. Participates in skilled maintenance and repair of HVAC systems, electrical, buildings and structures and ensures they are well-maintained, including: boilers, chillers, pumps, heat exchangers, air handling equipment, variable frequency drives and remote terminal units.