Full-Time

Mid-Level Start-Up Technician

Service

Deadline 8/5/27
CoolSys

CoolSys

1,001-5,000 employees

Refrigeration and HVAC design, installation, maintenance

Compensation Overview

$30 - $72/hr

+ Quarterly bonus + 401(k) match

Fullerton, CA, USA

In Person

Travel, overnight work, and overtime may be required.

Category
Mechanical Engineering (1)
Required Skills
HVAC

Get referred to CoolSys

See people who can refer or advise you

Requirements
  • Expert knowledge of refrigeration, ice machines, and electrical systems.
  • Expert knowledge of single systems, parallel rack systems, display cases, and walk-ins.
  • Ability to efficiently troubleshoot commercial and supermarket refrigeration equipment.
  • Expert knowledge of energy management systems in supermarket applications for wiring and programming, including CPC, Novar, and Danfoss.
  • Strong mechanical aptitude.
  • Ability to read refrigeration, electrical, and plumbing blueprints.
  • Ability to organize and prioritize your own work schedule and the work schedules of others on a short-term basis.
  • A good driving record.
  • Travel, overnight, and overtime work as needed.
  • High school diploma or GED.
  • Coursework at an accredited vocational, technical, or trade school.
  • At least 3 years of experience with supermarket energy management systems.
  • Five to seven years of experience in commercial refrigeration, especially parallel rack systems.
  • Experience and proficient knowledge of supermarket refrigeration.
  • Environmental Protection Agency Section 608 Type I and II Certification.
  • A valid driver's license must be maintained at all times.
Responsibilities
  • Perform start-up of supermarket refrigeration, heating, and ventilation equipment to meet customer needs efficiently, accurately, and on time.
  • Assist with Energy Optimization projects.
  • Perform evacuations of parallel racks after verifying pressure tests.
  • Perform all energy management system wiring and programming for energy management system manufacturers.
  • Perform full start-up of new parallel refrigeration systems and individual systems.
  • Lead small projects such as single-case and condenser changeouts.
  • Assist with Energy Optimization projects, including supermarket system-performance or utility-program retro-commissioning, energy management system upgrades, leak-detection upgrades, and gas-conversion projects.
  • Work with local branch Service and Construction Managers between projects to assist in problematic stores and provide training for junior technicians and foremen.
  • Function as the subject matter expert for processes, procedures, and projects.
  • Perform other duties as assigned.
Desired Qualifications
  • Energy Management System certification.

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

  • Ares acquired CoolSys in 2025, signaling deeper capital support and exit optionality.
  • Rich Wyckoff became CEO in 2025, stabilizing leadership after Rick Frier's interim run.
  • June 2026 acquisitions in Connecticut and Virginia extend geography and deepen Northeast density.

What critics are saying

  • Melinda James wage claims in California expose CoolSys to settlement costs and copycat suits.
  • The 2025 $150 million facility keeps lenders inside a heavily leveraged roll-up.
  • Rapid acquisitions from Eastern Refrigeration to Richmond Refrigeration risk integration failures and service outages.

What makes CoolSys unique

  • CoolSys serves 45,000 locations with 3,200 employees nationwide.
  • It covers design, installation, maintenance, energy optimization, and end-of-life recommercing.
  • Ares-backed consolidation gives CoolSys unusual national density across refrigeration and HVAC.

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

25%

1 year growth

25%

2 year growth

25%
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.