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Commercial HVAC Commissioning & Field Service Technician

Job in Thomaston, Litchfield County, Connecticut, 06787, USA
Listing for: Alliance All Trades, Inc.
Full Time position
Listed on 2026-06-12
Job specializations:
  • Trades / Skilled Labor
    Field/Service Technician, Installation Technician, HVAC Tech / Heating Engineer, Maintenance Technician / Mechanic
Salary/Wage Range or Industry Benchmark: 60000 - 80000 USD Yearly USD 60000.00 80000.00 YEAR
Job Description & How to Apply Below

What your day looks like

Morning starts on-site at a new install, powering up equipment and walking through control sequences with a project manager. By mid‑day you’re verifying sensors, dialing in setpoints, and documenting functional performance tests. In the afternoon, you pivot to a field service call to troubleshoot a rooftop unit, close a punch list item with the installer, and finish with customer training and a clean handoff.

Core

Impact
  • Start up and commission rooftop units, split systems, chillers, and control systems.
  • Diagnose and repair issues in the field across electrical, mechanical, and controls.
  • Calibrate sensors, verify sequences of operation, and confirm setpoints.
  • Execute functional performance testing and produce complete documentation.
  • Provide customer training and handoff materials to ensure a confident turnover.
  • Collaborate with project managers, installers, and subcontractors to resolve punch list items.
  • Keep thorough service reports, parts usage, and warranty records.
  • Follow safety protocols and represent the company with professionalism onsite.
What you bring
  • 3+ years in field service, startup, commissioning, or controls (commercial HVAC preferred).
  • Experience with VRF (variable refrigerant flow) systems strongly preferred.
  • Knowledge of HVAC controls, refrigerant charging practices, and electrical fundamentals.
  • Comfort with diagnostic tools (multimeter, manifold gauges) and using a tablet/computer.
  • Exceptional troubleshooting ability, meticulous attention to detail, and clear customer communication.
  • Valid driver’s license and willingness to travel to customer locations.
  • CT S, or D license is required.
Where you’ll work

Primarily onsite at new installations and in the field responding to service calls, ensuring systems operate safely and efficiently.

What we offer
  • Excellent pay (based on experience) + overtime
  • Health, dental, and vision options
  • Paid time off and holidays
  • 401K and profit sharing
  • Company vehicle
  • Training and certification support, career advancement opportunities
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