Service Tech III

HVAC Service Technician III

Since 1980, Dyna Ten Corporation (a Comfort Systems USA Company) has delivered high-quality Commercial Construction and Service Solutions across the greater North Texas market. We partner with our clients to provide technical expertise and high-level execution on every project. As a result, Dyna Ten is a trusted provider of HVAC, Plumbing, and Building Automation Controls solutions.

Our culture is built on accountability, teamwork, and a commitment to developing our people. We take pride in promoting from within, supporting both field and office teams, and delivering results the right way. We offer strong long-term career opportunities, excellent benefits, and a positive, team-oriented work environment.

The HVAC Service Technician III independently diagnoses, services, and repairs complex commercial HVAC systems and specialized equipment. This advanced technician role conducts detailed system and airflow diagnostics, manages significant customer interactions, and supports high-quality Service execution.

• Service KKT equipment, cooling towers, Intelli Pak units, SCUD units, pumps, and other assigned commercial HVAC equipment.
• Independently service and troubleshoot complex HVAC systems.
• Perform light- through heavy-commercial HVAC work.
• Conduct advanced airflow diagnostics, duct balancing, and static-pressure testing.
• Work directly with customers to support HVAC maintenance, repair, and equipment-replacement needs.
• Troubleshoot HVAC issues and correct mechanical failures within the technician's demonstrated level of proficiency.
• Follow established safety requirements and model safe work practices.
• Represent Dyna Ten professionally as a direct customer contact.
• Communicate equipment conditions, work performed, recommendations, and follow-up needs clearly to customers and Service leadership.
• Complete required service documentation accurately and on time.
• Maintain tools, equipment, vehicle, and work areas in a safe and professional condition.
• Perform other duties as assigned.

• At least 7-10 years of HVAC Service experience.
• Expert knowledge of HVAC systems in commercial and industrial settings, including refrigeration cycles, psychrometrics, and system-efficiency optimization.
• At least 3-5 years of experience diagnosing and troubleshooting high-end, multistage, variable-speed, and VRF/VRV systems.
• At least 5 years of complex mechanical, electrical, and refrigerant troubleshooting and repair experience.
• At least 5 years of electrical and controls experience, including interpretation of complex wiring diagrams, low- and high-voltage circuits, and advanced control logic.
• EPA certification and Texas TDLR registration.
• Demonstrated technical capability with a customer-service mindset.
• Strong verbal and written communication skills.
• Commitment to integrity, safety, and quality.
• Positive and self-motivated approach.
• Ability to pass a pre-employment drug screen and background check.

• Advanced manufacturer or equipment certifications.
• OSHA 10 certification.

• Exceptional health, dental, and vision insurance.
• Paid Employee-Only Medical Coverage.
• In-house and manufacturer-led training and leadership development.
• Long-term career growth into operations, sales, technical, and/or leadership roles.
• Comprehensive benefits package and employer-sponsored professional memberships.
• 401(k) match, PTO, holiday pay, and more.
• Stable work with a 40-hour guarantee.

Work is performed in customer facilities, mechanical rooms, rooftops, and indoor and outdoor Service environments. The role may require standing, walking, climbing ladders, bending, lifting, using tools, working around…