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OSI

Tech-Refrig-AshUnion 2nd Shift

Chicago, IL, United States

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Job details

Experience: § 7 - 10 years’ experience in troubleshooting, repair and maintenance of plant refrigeration / boilers / ammonia
Posting language: English
Posted: Nov 9, 2026

Original job description

Perform, coordinate and document all activities related to operating and maintaining the Ammonia System and Utilities Room. Follow proper procedures and safety guidelines.

Job Responsibilities

Job is an individual contributor.
Job is an individual contributor and has no direct reports.

•§ Diagnoses and troubleshoot complex refrigeration/boiler/ammonia / fire system / building issues

§ Perform scheduled preventative maintenance on refrigeration/boiler/ammonia / boiler equipment

§ Perform lubrication / blow downs / daily checks / level checks that are due with systems daily-weekly-monthly

§ Replace broken belts / bearings /motors / electrical parts on the equipment as necessary

§ Repair pipes /plumbing / valves / actuators / pneumatics /electrical etc.

§ Help Contractors Build / modifications machine or system improvements as requested by leader/supervisor/management

§ Troubleshoot and repair electrical system and control for equipment throughout refrigeration boilers in plant

§ Keep area clean / and ensure contractors follow OSI rules and cleanliness of area and plant

§ Can coordination with shift lead/supervisor/manager for in-house needs and applying to SAP system.

§ Perform day-to-day operation / checks / PMs / follow ups / work as assigned buy leader.

§ Perform on-the-job training via alchemy / contractors / computer as directed by lead/supervisor/manager.

§ Work with team members in all grade levels with trouble shooting.

§ Ability to work under pressure and meet deadlines

§ Effective communication and interpersonal skills

§ Proficiency in using diagnostic tools and equipment

§ Perform quality control checks on repairs completed by staff

§ Trouble shoot electrical 480/240/120 VAC-24 VAC/VDC

§ Perform other duties as assigned.

§ Assist as directed with contracted services for HVAC and refrigeration/ammonia equipment and Consults with HVAC Refrigeration Specialists and Technicians if needed

§ Evaluates, prioritizes, and performs routine and specialty installation, repair, and maintenance work orders as needed for departmental / plant needs

This role has the responsibility to understand and places in practice appropriate safety procedures. This responsibility is achieved through education, training, use of protective equipment (as applicable) and by following safety policies, regulations, standards, and laws.
Perform other duties as assigned.

Compensation/Benefits

The starting hourly rate for this position is $39.50 This role is a union role and is eligible for overtime pay for hours worked beyond 40 hours in a week and may also be eligible for additional hourly premiums for perfect attendance and/or working evening or night shifts. OSI also offers comprehensive paid time off (sick, vacation, holidays and other programs), 401k with matching company contributions, a full suite of benefit offerings (medical, dental, vision, life, disability and other voluntary coverages) for you and your family and educational assistance with opportunities for professional development. For complete details about the full benefit offerings, please request a copy of the collective bargaining agreement.

We are committed to fair and transparent pay practices.

Additional Compensation:

This position may also be eligible for overtime pay, shift differentials, and/or bonus opportunities, as applicable.

Benefits:

We offer a comprehensive benefits package that may include medical, dental, vision, 401(k), paid time off and holidays, and more. A full summary of benefits will be provided upon hire.

Compensation information is available on our careers site. If you are viewing this role on a third-party platform and do not see pay details, please visit our careers page www.osigroup.com/careers/ for full transparency.

This pay range represents the company’s good faith estimate at the time of posting.

Experience & Skills

§ 3 years on the job training mechanical engineering, refrigeration or related skill

§ 7 - 10 years’ experience in troubleshooting, repair and maintenance of plant refrigeration / boilers / ammonia

§ Knowledge of inverters and proximity switches is required.

§ Must be able to service and troubleshoot equipment.

§ Knowledge of the equipment, tools, and test instruments used for water treatment in mechanical systems

§ Must be able to read blueprints electrical prints pneumatic prints

§ Possess basic refrigeration knowledge. Basic knowledge of welding and fabrication techniques.

§ Must have knowledge of electrical, pneumatic, and hydraulic systems.

§ Must have knowledge and skills in the technologies of Anhydrous Ammonia, electrical systems, electronic systems, microprocessors, mechanical systems (e.g., production/process refrigeration boilers, HVAC hydraulics, and pneumatics), and computerized maintenance management systems SAP. Working knowledge of food plant production and processing equipment

§ RETA (Refrigerating Engineers & Technicians Association) certified

§ Stationery Engineer/Boiler License Required

§ Must have a high school diploma or equivalent of a GED.

§ An associate degree in mechanical and/or industrial engineering would be preferred but not required.

§ OP1/OP2/OP3 (TECH 1)/PSM certifications and maintain them, renewed every three (3) years. CIRO- Certified Industrial Refrigeration Operator preferred and renewed yearly after having 2 years certified Refrigeration Energy Specialist or ability to obtain.

Education

High School degree or equivalent is preferred.
Ammonia Refrigeration Certification is a plus.

Work Environment

Work can be performed within a manufacturing plant environment with noise, extreme temperatures, and significant movement of powered equipment, people and conveyor (may depend on the role).
Work conditions are typical of a food manufacturing facility.
This role does not require any domestic travel
Position requires the physical agility to perform continuous lifting up to 50 pounds, bending, squatting, pushing, pulling, stretching/reaching, use hands or fingers, talk, hear, feel objects, tools, controls and standing/walking on concrete flooring.
Position requires the physical ability to stand/walk for the duration of work hours.

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More about this job

Skills

Troubleshoot
SAP
Cope with pressure
Meet deadlines
Communication skills
Interpersonal skills
Quality control
HVAC
Mechanical engineering
Troubleshooting
Mechanical systems
Welding
Electronics
Microprocessors
Production processes
Industrial engineering
PSM
CIRO
Food engineering
Heavy lifting

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