VRF Commissioning & Controls Field Technician

Dmg Hvac; Orange (CA); On-site; USD 55,000 - 90,000; Full time

Benefits offered by this job

Benefits package

Competitive pay

Job summary

Ambient is seeking an on-site startup technician to support commercial HVAC projects across Southern California. You will diagnose and validate Daikin, AAON, and LG systems, program new controls, and ensure proper sequences of operation from wiring diagrams to commissioning.

Expect field work on rooftops and in mechanical rooms with a focus on reliability and documentation. You will read schematics, coordinate with installers, perform preventive maintenance, and complete startup paperwork for

Qualifications

• High school diploma or GED.
• Two years HVAC training program.
• Valid California License.
• EPA Universal Technician Certification.

Responsibilities

• Serve as the on-site startup technician for multiple manufacturers on commercial projects.
• Troubleshoot and validate control system installations for VRF and other systems.
• Program touchscreens and laptops; verify sequences of operation.
• Read wiring diagrams and equipment manuals to expedite commissioning and repairs.
• Document actions, test results, and resolutions in service reports; submit startup paperwork for warranty.

Skills

HVAC trade practices

Troubleshooting

Wiring diagrams

Documentation

Education

HVAC training program

EPA Universal Technician Certification

High school diploma or GED

Tools

Daikin systems

AAON systems

LG systems

Job description

Shape High‑Performance Buildings Across Southern CaliforniaAt DMG (an Ambient Company), you’ll put your hands on the newest commercial HVAC technology and see your work come to life in hospitals, offices, and other mission‑critical spaces. With 150+ teammates across Orange County, Los Angeles, and surrounding areas, we blend big‑company resources with a close‑knit, family feel. We offer an excellent benefits package, competitive pay, and a culture that values craftsmanship and care.A Day in the LifeYour morning starts with a startup checklist for a new VRF install in Orange County. By mid‑day, you’re on a rooftop, interpreting a wiring schematic and programming a touchscreen controller. You collaborate with the installing contractor to fine‑tune setpoints, document findings in a service report, then submit startup documentation for warranty registration before heading to your next site to troubleshoot a communications issue on a BMS network.What You’ll DoServe as the on‑site startup technician for multiple manufacturers on commercial projects.Troubleshoot and validate control system installations on Daikin, AAON, and LG commercial HVAC systems.Apply strong reasoning and logic to isolate faults; coordinate directly with the original installers to resolve issues.Program new control systems using touchscreens and laptops; verify proper sequences of operation.Read and interpret wiring diagrams and equipment manuals to expedite commissioning and repairs.Document actions, test results, and resolutions in detailed service reports; complete and submit all startup paperwork for warranty.Perform preventive maintenance, routine servicing, and repairs as needed.Perform other duties and assignments while maintaining regular, reliable attendance.Knowledge & AbilitiesHVAC trade practices, industry standards, and refrigeration system theory.Materials, methods, and tools for installation, operation, and repair of commercial HVAC/R systems.Electrical theory as applied to common HVAC equipment and controls.Ability to read/interpret manuals and HVAC wiring schematics.Brazing and soldering techniques; applicable health and safety regulations.Basic record‑keeping and proper storage/handling of tools, materials, and supplies.Advanced Technical ExpertiseLG and AAON commercial systems, and commercial package units.VRF systems with expert‑level understanding of refrigerant properties.HVAC controls systems and advanced troubleshooting.Automated temperature control systems; BMS communication systems and functionality.Modern, computer‑based HVAC platforms; proficiency with email, internet applications, basic office software, and computer networking.Education & ExperienceHigh school diploma or G.E.D.Two years of HVAC training program.Licenses & CertificationsValid California License.Active EPA Universal Technician Certification.Compensation & Benefits$40–$65 per hour DOE. We offer excellent health benefits, a 401(k) plan, Paid Time Off, Paid Holidays, and flexible scheduling.About AmbientAmbient is a collective of HVAC design and implementation experts, each entity esteemed in their respective regions, with decades of experience. Our experts merge craft with care, delivering safety, comfort, and highly efficient, sustainable solutions for spaces that matter most: healthcare, commercial, and residential. We have over 1k employees across the US and Canada.