Job Description

Senior Commercial HVAC Technician

Position Summary

The Senior Commercial HVAC Technician is responsible for independently performing

advanced diagnostics, preventive maintenance, repairs, equipment replacements, and

system commissioning on commercial and industrial HVAC equipment. This position

serves as a lead field technician and technical resource for junior technicians, ensuring

work is performed safely, efficiently, and in accordance with company standards,

manufacturer specifications, and applicable codes.

The Senior HVAC Technician is expected to diagnose complex mechanical, electrical,

controls, refrigeration, and airflow issues; provide detailed repair recommendations;

oversee large-scale HVAC projects; and maintain strong client relationships while

representing the company in a professional manner.

Essential Duties & Responsibilities

Preventive Maintenance

Perform and oversee complete preventive maintenance programs for commercial HVAC

systems including:

• Replace and clean HVAC filters.

• Inspect and clean condenser and evaporator coils.

• Inspect and adjust belts, pulleys, and sheaves.

• Lubricate bearings, motors, and moving mechanical components where applicable.

• Verify operation of thermostats, sensors, relays, and control systems.

• Inspect contactors, capacitors, transformers, disconnects, and electrical

components.

• Tighten electrical connections and inspect for overheating or deterioration.

• Measure and record voltage, amperage, refrigerant pressures, superheat,

subcooling, temperatures, and airflow readings.

• Inspect blower assemblies, fan motors, bearings, shafts, and fan blades.

• Inspect condensate drain pans, drain lines, and condensate pumps.

• Verify proper operation of safety controls and equipment sequence of operation.

• Identify equipment deficiencies and recommend corrective repairs.

• Complete detailed maintenance reports and asset condition assessments.

Service, Troubleshooting & Repairs

• Diagnose and repair commercial HVAC, refrigeration, and ventilation systems.

• Troubleshoot complex electrical, mechanical, refrigerant, and controls-related

issues.

• Repair rooftop units, split systems, package units, heat pumps, exhaust fans, makeup air units, VAV systems, and related equipment.

• Perform advanced diagnostics on compressors, fan motors, economizers, control

boards, sensors, VFDs, and electrical circuits.

• Troubleshoot power distribution, low-voltage controls, and building automation

interfaces.

• Perform refrigerant leak detection and repair.

• Recover, evacuate, and charge refrigerant systems.

• Perform compressor replacements and major equipment repairs.

• Respond to emergency service calls and critical equipment failures.

• Develop repair scopes and material requirements for corrective work.

Equipment Replacements & Installations

• Lead HVAC equipment replacement and retrofit projects.

• Install rooftop units, split systems, exhaust fans, make-up air units, and associated

components.

• Coordinate crane lifts and rooftop equipment replacements when required.

• Perform equipment startup and commissioning.

• Verify proper airflow, ventilation, refrigeration operation, and system performance.

• Assist in project planning, scheduling, and execution.

Controls & System Optimization

• Diagnose and troubleshoot building automation systems and HVAC controls.

• Calibrate thermostats, sensors, and control devices.

• Verify proper economizer operation and energy-saving sequences.

• Optimize equipment performance and recommend energy-efficiency

improvements.

• Analyze operating trends and identify opportunities to improve system reliability.

Leadership & Training

• Provide technical guidance and mentorship to HVAC apprentices and mid-level

technicians.

• Assist with field training and development of junior personnel.

• Review completed work for quality and compliance.

• Support service managers with technical troubleshooting and project planning.

• Assist with estimating repairs and replacement projects.

Safety & Compliance

• Enforce company safety policies and OSHA requirements.

• Perform lockout/tagout procedures during servicing and repairs.

• Ensure compliance with EPA refrigerant handling regulations.

• Maintain safe operation of company vehicles, tools, and equipment.

• Perform work in accordance with local building, mechanical, and electrical codes.

• Maintain a clean and professional job site.

Documentation & Customer Relations

• Complete detailed service reports, inspection reports, and repair quotations.

• Document equipment deficiencies and provide recommendations for corrective

action.

• Communicate directly with property managers, facility engineers, tenants, and

customers.

• Maintain professional appearance and customer-focused service at all times.

Qualifications

• Minimum 7 to 10 years of commercial HVAC service experience.

• Extensive experience servicing commercial rooftop units, split systems, package

units, heat pumps, exhaust systems, and make-up air equipment.

• Strong understanding of refrigeration systems and electrical troubleshooting.

• Ability to independently diagnose complex HVAC system failures.

• Experience performing compressor replacements and major equipment repairs.

• Ability to read and interpret wiring diagrams, schematics, blueprints, and sequence

of operations.

• Familiarity with building automation and energy management systems.

• Valid driver's license with acceptable driving record.

• Ability to work independently with minimal supervision.

Knowledge & Skills

• Advanced HVAC troubleshooting.

• Refrigeration diagnostics and repair.

• Electrical diagnostics up to 480 volts.

• Building automation system troubleshooting.

• VFD diagnostics and programming.

• Airflow balancing and ventilation diagnostics.

• Equipment startup and commissioning.

• Project coordination and leadership.

• Customer communication and repair recommendations.

• Strong organizational and documentation skills.

Physical Requirements

• Ability to lift and carry up to 75 pounds.

• Ability to climb ladders and access rooftop equipment.

• Ability to work in mechanical rooms, rooftops, and confined spaces.

• Ability to work outdoors in varying weather conditions.

• Ability to perform emergency service, overtime, and after-hours work as required.

Required Certifications

• EPA Universal Certification.

• OSHA 10 Certification (OSHA 30 preferred).

• Valid Driver's License.

Preferred Certifications

• HVAC Trade School Certificate or Equivalent Experience.

• Manufacturer Certifications (Carrier, Trane, Daikin, Lennox, York, AAON, etc.).

• Building Automation System Training.

• CPR/First Aid Certification.

Company Description

CalTek is a manufacturing, technical, engineering and IT consulting firm that has expanded its business operations from its headquarters in San Diego, throughout all of California and into Arizona, Colorado, Florida, Georgia, Texas and Washington. CalTek has staffed positions with global companies such as Siemens, Parsons, and Illumina but also works with startups with 10+ employees.

Company Description

CalTek Staffing, Inc.

Latest Jobs

Sr. Commercial HVAC Service Tech