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CoolSys

Refrigeration and HVAC design, installation, maintenance

Refrigeration Service Technician - Commercial & Industrial

Full-TimeDeadline 8/24/27
$27 - $46
Mid, Senior
Stamford, CT, USA
Remote
Building TradesHVAC & Building Systems

About the job

Requirements
  • A high school diploma or GED, equivalent work experience, and trade or technical school classes are required.
  • A valid EPA certificate is required.
  • Three to five years of experience in commercial HVAC, refrigeration, and electrical work are required.
  • Basic knowledge of refrigeration, HVAC, ice machines, gas furnaces, and electrical systems is required.
  • Knowledge and understanding of single and multiple-unit systems, rack systems, parallel racks, rack control units, display cases, and walk-in boxes are required.
  • Strong knowledge of open circuits on a rack compressor control circuit is required.
  • Knowledge of lockout/tagout and arc-flash equipment is required.
  • Knowledge of case lineups with electric defrost circuits is required.
  • Ability to use an RS engineering sheet is required.
  • Knowledge of minimum DA/RA and SST requirements for FF/IC systems is required.
  • Ability to identify refrigeration floor-plan symbols is required.
  • Ability to take readings of compressor parameters and compression ratios and repair deficiencies is required.
  • Knowledge of proper material-handling techniques is required.
  • Knowledge of HVAC valve settings, preventive maintenance, locating leaks with a refrigerant leak detector, and reporting large refrigerant leaks is required.
  • Ability to demonstrate proper personal protective equipment and safety equipment is required.
  • Knowledge appropriate to level 2–3 experience is required.
  • Ability to lift up to 60 pounds without assistance and to sit and/or stand for several hours at a time is required.
  • A valid driver’s license and a good driving record are required.
  • Ability to understand and follow company policies and procedures and applicable state and federal laws is required.
  • Ability to use typical business tools, including email, Word, and Excel, is required.
Responsibilities
  • Report to work in a timely manner as scheduled by the supervisor.
  • Repair and overhaul 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 repairs on refrigeration, heating, and ventilation equipment, including air-conditioning units, evaporative condensers, ice-machine equipment, water pumps, gas furnaces, compressors, and electric motors.
  • Perform preventive maintenance, diagnose equipment malfunctions, and assess the operating efficiency of mechanical equipment.
  • Perform minor construction and remodeling projects, including startups of new installations.
  • Provide guidance to junior technicians and help ensure the safe, efficient, and reliable operation of refrigeration equipment for commercial or industrial clients.
  • Perform other duties as assigned.
Desired Qualifications
  • Experience working on refrigeration equipment in convenience stores or supermarkets is a strong plus.

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

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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.

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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

25%

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.