Commercial HVAC Senior Service Technician

About the role

System One is seeking a Senior Service Technician to support commercial and industrial mechanical service operations across the Houston market. The role involves diagnosing, repairing, stabilizing, documenting, and closing out complex service work with limited supervision while representing the client professionally with customers, dispatch, service management, and fellow technicians.

The position is a direct hire in Houston, TX. Compensation is $40-55/hr.

Responsibilities

• Run commercial and industrial service calls from dispatch through closeout with limited supervision.
• Confirm the mission, customer expectations, equipment, access, safety requirements, and expected outcome before committing labor.
• Perform safe arrival, site verification, diagnostics, repairs, stabilization, testing, and customer communication.
• Document actual hours, work performed, parts used, readings, photos, customer communication, recommendations, and final disposition for billing, follow-up, and future service history.
• Diagnose and service rooftop units, split systems, air handlers, chilled water systems, hydronic heating systems, pumps, motors, fans, VFDs, controls, and related commercial mechanical equipment.
• Use structured root-cause diagnostics, including airflow, electrical, refrigeration, water flow, controls, pressure, temperature, and operating-sequence verification.
• Interpret readings such as superheat, subcooling, amp draw, voltage, temperature split, delta-T, pressure differential, flow indicators, VFD fault history, and BAS/control signals where applicable.

Requirements

• Strong commercial HVAC and mechanical service experience.
• Understanding of union field expectations and the ability to work within the client's service standards for readiness, field verification, safe execution, complete documentation, customer communication, and sell-forward opportunity identification.
• Ability to diagnose, repair, stabilize, document, and close out complex service work with limited supervision.

Key facts

• Direct hire position in Houston, TX.
• Supports commercial and industrial mechanical service operations across the Houston market.
• Requires strong commercial HVAC and mechanical service experience.
• The role involves service calls from dispatch through closeout with limited supervision.