C

CoolSys

Refrigeration and HVAC design, installation, maintenance

Senior Refrigeration Service Technician - Commercial & Industrial

Full-TimeDeadline 8/17/27
$32 - $60/yr
Senior
Wallingford, CT, USA
In Person
Building TradesHVAC & Building Systems

About the job

Requirements
  • A high school diploma or GED, equivalent work experience, and trade or technical school classes.
  • A valid EPA certificate.
  • At least six years of experience in commercial HVAC, refrigeration, and electrical work.
  • Basic knowledge of refrigeration, HVAC, ice machines, gas furnaces, and electrical systems.
  • Knowledge of input/output networks with board power.
  • Ability to troubleshoot a lost board, no-response alarm, and fan-failure alarm.
  • Knowledge of suction pressure transducers for Comtrol, E2, RMCC, and Danfoss.
  • Knowledge of all boards and input devices in an energy management system and their functions.
  • Knowledge of a Hansen rod.
  • Knowledge of the operation of a condenser bypass panel and variable speed drive.
  • Knowledge and ability to perform proper inverter maintenance.
  • Knowledge of evaporative condensers and indoor humidity sensors.
  • Ability to verify a story is properly pressurized.
  • Ability to verify heat staging, operation, anti-sweat operation, and exterior light operation.
  • Knowledge of floating suction operation for E2 and Danfoss systems.
  • Ability to demonstrate proper personal protective equipment and safety equipment.
Responsibilities
  • Report to work in a timely manner as scheduled by a supervisor.
  • Repair and overhaul equipment such as compressors, water pumps, air handlers, electrical and mechanical control devices, and similar machinery.
  • Test malfunctioning systems and components using electrical and/or mechanical skills.
  • Maintain legible corporate and personal records of work history.
  • Perform general repair work on refrigeration, heating, and ventilation equipment, including air conditioning units, evaporative condensers, ice machine equipment, water pumps, gas furnaces, compressors, and electric motors.
  • Perform preventative maintenance; diagnose equipment malfunctions and the operating efficiency of mechanical equipment.
  • Perform work on minor construction and remodeling projects, including startups of new installations.
  • Troubleshoot, maintain, and repair refrigeration systems, handle complex technical issues, and ensure the safe, efficient, and reliable operation of refrigeration equipment for commercial or industrial clients.
  • Provide guidance to junior technicians.
  • Perform other duties as assigned.
Desired Qualifications
  • Experience working on refrigeration equipment in convenience stores or supermarkets.
  • Familiarity with single systems and rack systems, along with previous work on display cases and walk-in boxes.

About the company

CoolSys provides refrigeration and HVAC services to retail, commercial, and industrial clients. It designs, installs, and remodels systems, converts refrigerants, performs preventative maintenance, repairs, and optimizes energy use and overall system performance. Their products are not a physical device but a service offering: engineers create system designs, technicians install and service equipment, and ongoing monitoring and maintenance help keep temperatures stable and energy use efficient. What sets CoolSys apart is its broad, industry-focused experience across grocery, food service, telecommunication, manufacturing, education, entertainment, and pharma sectors, plus a persistent emphasis on reliability, integrity, and meeting client commitments while addressing environmental sustainability. The company aims to improve clients’ operations, experiences, and work environments through high-quality, dependable service and energy-efficient, properly maintained systems.

Company Size

1,001-5,000

Company Stage

Debt Financing

Total Funding

$150M

Headquarters

Brea, California

Founded

2017

Get referred to CoolSys

See people who can refer or advise you

Simplify Jobs

Simplify's Take

What believers are saying

  • Energy Squared joined on August 17, 2026, strengthening MEPR design capabilities.
  • Ares-backed credit support in September 2025 extended liquidity and refinanced prior lenders.
  • CoolSys keeps buying specialists, including 1GNITE, Lima, and Georgia Air Solutions.

What critics are saying

  • June 2026 amendments added PIK debt through 2027, signaling financing strain.
  • Randolph v. CoolSys and the 2026 wage-hour settlement expose recurring labor liabilities.
  • Ares ownership and relentless add-ons create integration drag; one failed merger hurts service quality.

What makes CoolSys unique

  • CoolSys unified Source Refrigeration under one brand in July 2026.
  • Its 2026 portfolio spans refrigeration, HVAC, energy, engineering, and equipment removal.
  • Recurring maintenance contracts drove 54% of revenue and 96% customer retention in 2025.

Help us improve and share your feedback! Did you find this helpful?

Benefits

Health Insurance

Dental Insurance

Vision Insurance

Paid Vacation

Paid Holidays

401(k) Company Match

Training Programs

Tuition Reimbursement

Pet Insurance

Employee Discounts

Performance Bonus

Growth & Insights and Company News

Headcount

6 month growth

26%

1 year growth

26%

2 year growth

26%
FreightWaves
Sep 4th, 2025
CoolSys secures $39.5M: A game-changer for cooling industry

CoolSys secures $39.5M: A game-changer for cooling industry.

Abl Advisor
Sep 3rd, 2025
Wingspire Capital Provides $39.5MM Senior Credit Facility to CoolSys - News | ABL Advisor

Wingspire Capital has provided a $39.5 million senior secured credit commitment to CoolSys, a leader in mission-critical HVAC, refrigeration, and energy and carbon reduction solutions for thousands of businesses across the United States.The commitment is part of a broader $150 million credit facility for CoolSys with a syndicate led by Mizuho  that...

Business Wire
Oct 1st, 2024
CoolSys Acquires Mechanical Engineering & Construction Corporation

CoolSys™, the market-leading provider of sustainable refrigeration, HVAC, energy and engineering solutions, has acquired Mechanical Engineering &

The Daily Record
Sep 30th, 2024
CoolSys acquires Catonsville mechanical engineering firm

In acquiring MEC2, CoolSys will strengthen its commercial and industrial capabilities while deepening its market presence in the mid-Atlantic region.

Business Wire
Jun 18th, 2024
CoolSys Acquires Universal Refrigeration

CoolSys acquires Universal Refrigeration.