Commercial & Industrial Senior HVAC Technician

Location: Ellisville, MS

Job : 364

# of Openings: 1

The Commercial & Industrial Senior HVAC Technician is responsible for the installation, maintenance, troubleshooting, repair, and optimization of commercial and industrial HVAC, refrigeration, and building automation systems. This position serves as the lead technician on complex projects, mentors junior technicians, ensures compliance with safety standards, and helps maintain reliable environmental systems that support facility operations.

• Install, maintain, troubleshoot, and repair commercial and industrial HVAC equipment including:
  • Air handling units (AHUs)
  • Rooftop units (RTUs)
  • Chillers
  • Cooling towers
  • Boilers
  • Variable refrigerant flow (VRF) systems
  • Split systems
  • Package units
  • Exhaust and supply fans
  • Pumps and hydronic systems
  • Commercial refrigeration equipment
• Diagnose mechanical, electrical, electronic, pneumatic, and control system failures.
• Perform preventive and predictive maintenance on HVAC equipment.
• Inspect equipment to identify deficiencies before failures occur.
• Read and interpret blueprints, wiring diagrams, schematics, and specifications.
• Install and calibrate thermostats, sensors, actuators, and control devices.
• Troubleshoot and repair Building Automation Systems (BAS) and direct digital controls (DDC).
• Test refrigerant pressures, airflow, temperatures, electrical circuits, and system performance.
• Recover, recycle, and charge refrigerants in accordance with EPA regulations.
• Perform welding, brazing, soldering, and pipe fitting as required.
• Replace compressors, motors, bearings, belts, valves, heat exchangers, and other HVAC components.
• Maintain accurate maintenance records, service reports, and inventory documentation.
• Coordinate work with contractors, vendors, and facility personnel.
• Assist with HVAC system upgrades, renovations, and capital improvement projects.
• Respond to emergency service calls during evenings, weekends, and holidays as assigned.
• Train, mentor, and provide technical guidance to junior HVAC technicians.
• Recommend equipment replacements and energy-saving improvements.
• Ensure compliance with OSHA regulations, environmental requirements, and company safety policies.

• High school diploma or GED.
• Technical or vocational training in HVAC or related field preferred.
• Minimum of 7–10 years of commercial and industrial HVAC experience.
• EPA Section 608 Universal Certification.
• Valid driver's license with an acceptable driving record.
• Ability to pass background and pre-employment screening as required.

• HVAC Journeyman or Master License (where applicable)
• NATE Certification
• Experience with Siemens, Johnson Controls, Trane, Carrier, Honeywell, or Schneider BAS systems
• Experience maintaining large commercial or institutional facilities
• Experience with chilled water and boiler systems
• Electrical troubleshooting experience up to 480 volts
• Welding and pipe fitting experience

• Advanced knowledge of HVAC principles and refrigeration cycles
• Strong understanding of electrical systems and motor controls
• Proficiency using diagnostic instruments and testing equipment
• Ability to troubleshoot complex mechanical and control systems
• Knowledge of building automation systems
• Excellent communication and customer service skills
• Ability to prioritize multiple assignments
• Strong leadership and mentoring abilities
• Ability to work independently with minimal supervision

• Frequently lift and carry up to 75 pounds.
• Climb ladders and work from lifts or scaffolding.
• Work in confined spaces, crawlspaces, and mechanical rooms.
• Work indoors and outdoors in varying weather conditions.
• Frequently bend, kneel, stoop, crouch, and climb.
• Distinguish colors for electrical wiring identification.
• Work around moving mechanical equipment and electrical systems.

• Commercial buildings
• Mechanical rooms
• Rooftops
• Construction and renovation sites
• Exposure to heat, cold, noise, dust, refrigerants, and electrical hazards.
• Participation in an on-call rotation may be required.

• Refrigerant recovery machines
• Recovery cylinders
• Digital multimeters
• Megohm meters
• Combustion analyzers
• Airflow measurement equipment
• Hand and power tools
• Lifts and ladders
• Computerized maintenance management systems (CMMS)

• Technical expertise
• Problem solving
• Leadership
• Safety awareness
• Preventive maintenance
• Teamwork
• Time management
• Reliability

Jones County Junior College does not discriminate on the basis of race, color, national origin, age, sex, or disability in its programs, activities, or employment practices. The following persons have been designated to handle inquiries and grievances regarding the non-discrimination policies: (ADA/ Section 504) Sarah Jones, Director of Counseling & ADA Coordinator, Student Affairs, phone ; email ADA Coordinator and (Title IX) Sarah Ishee, Title IX Coordinator, Hutcheson Hubbard Administration Building,…