BAS Controls Technician — Field Service & Commissioning

AJ Group; San Francisco (CA); On-site; USD 110,000 - 140,000; Full time

Benefits offered by this job

Health insurance

Company vehicle and fuel card

Company-provided mobile phone and LAPt

Company-provided laptop

401(k) with employer matching

Paid holidays and paid time off

Ongoing technical training

Job summary

AJ Group is seeking a skilled Field Service Engineer to service, commission, and optimize Building Automation Systems and commercial HVAC controls across customer sites in the Bay Area. The role demands independent field work, diagnosing complex system faults, and delivering energy-efficient building control solutions.

You will troubleshoot, commission systems, and support installations while improving reliability and efficiency.

Qualifications

• Minimum of 5 years’ experience in building automation.
• Strong understanding of commercial HVAC systems, DDC controls, and building management technologies.
• Practical experience with controls programming, sequence development, and system integration.
• Ability to diagnose technical faults and implement effective solutions independently.
• Familiarity with BAS platforms and industry-standard communication protocols.
• Experience with Tridium Niagara and/or Distech Controls is preferred; training may be available for suitable candidates.
• Valid driving licence and willingness to travel to customer sites throughout the Bay Area.

Responsibilities

• Diagnose, troubleshoot, and repair faults across BAS and HVAC control systems.
• Configure and modify control programming and sequences of operation to improve system performance.
• Perform system startups, commissioning, functional testing, and verification of control equipment.
• Support new installations, retrofits, system upgrades, and integration of building control technologies.
• Identify opportunities to improve system reliability, operational efficiency, and energy performance.
• Maintain accurate service records and communicate technical findings to customers and project teams.

Skills

Building automation

HVAC systems

DDC controls

Controls programming

System integration

Diagnostics

Travel readiness

Tools

Tridium Niagara

Distech Controls

Job description

AJ Group is seeking a skilled Field Service Engineer to service, commission, and optimize Building Automation Systems and commercial HVAC controls across customer sites in the Bay Area. The role demands independent field work, diagnosing complex system faults, and delivering energy-efficient building control solutions.

You will troubleshoot, commission systems, and support installations while improving reliability and efficiency.