Journeyman-HVAC, Journeyman-EMS, EMS, Installer, Install, Installation, Service Tech, refridgeration, HVAC, refrigeration, HVAC-R, HVAC/R, diagnostic, commercial, service, mechanical, mechanic, AC, field service, chiller, specialist, HVACR, Electrical, pipefitter. Responsibilities: The Journeyman – Electrical is responsible for repairing, maintaining, and installing electrical and Energy Management Systems (EMS), including associated controls and wiring.