Diesel Mechanic

Aerotek; Minooka (IL); On-site; USD 34,000 - 47,000; Full time

Benefits offered by this job

Medical, dental & vision

401(k) Plan

Life Insurance

Disability insurance

Health Spending Account (HSA)

Transportation benefits

PTO

Job summary

Aerotek is hiring a Diesel Mechanic in Minooka, IL to perform both preventive and reactive repairs on tractors and trailers. You will use laptop-based diagnostics, conduct engine and brake work, and perform basic welding and fabrication as part of routine maintenance.

The role operates in a trailer-focused shop on a 2nd shift, with a fully onsite environment and a detailed pay range of $25.00 to $34.00 per hour. Benefits include health coverage, a 401(k), and safety gear provided by the company.

Qualifications

• 5+ years of experience maintaining trailers or semis.
• Hands-on fleet maintenance on tractors, trailers, or similar heavy equipment.
• Troubleshoot with a laptop and diagnostic software.
• Diagnose diesel engine systems on tractors and trailers.
• Experience with clutches, brakes, wheel seals, and suspensions.
• MIG and STICK welding for basic repair and fabrication.
• Operate torches and grinders safely in a shop.
• Thrives in a trailer-focused shop with some engine work.

Responsibilities

• Perform preventative and reactive repairs on tractors and trailers.
• Conduct preventive maintenance: lubrication, filters, tires, oil changes.
• Replace alternators, starters, brakes, and drive components as needed.
• Perform welding and basic fabrication tasks.
• Diagnose issues with on-board systems via laptop diagnostics.
• Document all work in maintenance software (Transman).
• Repair clutches, brakes, wheel seals, and suspensions.
• Support refrigerated and dry-van trailer maintenance.
• Coordinate with shop personnel to prioritize repairs.

Skills

Fleet maintenance

Diesel engines

Trailer repair

Laptop diagnostics

MIG welding

Stick welding

Safety protocols

5+ years exp

Tools

Transman

Diagnostic software

Job description

Join a dedicated fleet maintenance team as a Diesel Mechanic, performing both preventative and reactive repairs on tractors and trailers. In this role, you handle comprehensive preventive maintenance, engine and brake work, basic welding and fabrication, and electronic diagnostics using laptop-based tools and internal maintenance software.

Responsibilities

• Perform preventative and reactive repairs on tractors and trailers to ensure safe and reliable operation.
• Carry out preventive maintenance services, including lubrication, filter changes, interior and exterior cab checks, tire inspections (tread, inflation, rotation, wear), oil changes, and wheel seal inspections.
• Perform engine-related work such as replacing alternators, starters, drive cams, brakes, springs, differentials, alignment components, S-cams, and U-joints.
• Conduct MIG and stick welding as needed, including welding mud flaps, brackets, and other basic fabrication tasks.
• Use a torch and grinder safely for cutting, shaping, and repair work as required.
• Connect a laptop to engines and onboard systems to troubleshoot and diagnose mechanical and electronic issues.
• Track, document, and update all work performed using internal Transman (TMT) maintenance software.
• Perform maintenance and repairs on clutches, brakes, wheel seals, and suspension components.
• Support fleet maintenance activities for both refrigerated and dry-van trailers, following established procedures and safety standards.
• Collaborate with other mechanics and shop personnel to prioritize repairs and maintain an efficient workflow.

Essential Skills

• At least 5 years of experience performing maintenance on trailers or semis.
• Hands-on experience performing fleet maintenance on tractors, trailers, semis, or similar heavy-duty equipment.
• Ability to troubleshoot equipment and engine systems using a laptop and diagnostic software.
• Proficiency in diagnosing mechanical issues on diesel-powered tractors and trailers.
• Experience working with clutches, brakes, wheel seals, and suspension systems.
• Ability to perform MIG and stick welding for basic repair and fabrication tasks.
• Comfort using torches and grinders in a shop environment, following safety protocols.
• Ability to work effectively in a trailer-focused shop environment and adapt to engine and body work on tractors as needed.

Additional Skills & Qualifications

• Experience working on refrigerated trailers (reefers) is a strong plus.
• Refrigeration license or certification is preferred for work on refrigerated units.
• Prior experience in fleet maintenance for refrigerated and dry-van equipment.
• Familiarity with Transman (TMT) or similar maintenance tracking software.
• Strong attention to detail and commitment to safety.
• Ability to work independently on assigned repairs while collaborating with a team when needed.

Why Work Here?

This opportunity offers long-term stability in a well-established fleet maintenance operation, with potential raises based on performance and experience. You join a fully staffed shop environment where teamwork, safety, and professional growth are valued. The company provides uniforms and necessary safety equipment, supporting a professional, well-organized workplace that encourages skill development and advancement.

Work Environment

You work in trailer and tractor terminals that support a major warehouse operation, handling approximately 90% refrigerated and 10% dry-van equipment. One location operates primarily as a trailer shop with a team of around 12 mechanics, while another focuses on engine and body work for tractors. Facilities are relatively small, with 23 bays, and you move between indoor and outdoor areas to bring trailers and tractors in from the yard. The shop is non-union and operates on a 2nd shift schedule from 2:00 p.m. to 10:00 p.m., Tuesday through Saturday. You must provide your own steel-toed boots, while the company supplies uniforms, safety glasses, and hard hats as needed, maintaining a safety-conscious and professional dress code in the shop.

Job Type & Location

This is a Contract to Hire position based out of Minooka, IL.

Pay and Benefits

The pay range for this position is $25.00 - $34.00/hr.

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.

Eligibility requirements apply to some benefits and may depend on your jobclassification and length of employment. Benefits are subject to change and may besubject to specific elections, plan, or program terms. If eligible, the benefitsavailable for this temporary role may include the following:

• Medical, dental & visionCritical Illness, Accident, and Hospital401(k) Retirement Plan Pre-tax and Roth post-tax contributions availableLife Insurance (Voluntary Life & AD&D for the employee and dependents)Short and long-term disabilityHealth Spending Account (HSA)Transportation benefitsEmployee Assistance ProgramTime Off/Leave (PTO, Vacation or Sick Leave)

Job Type & Location

This is a Contract to Hire position based out of Minooka, IL.

Application Deadline

This position is anticipated to close on Nov 20, 2026.

Workplace Type

This is a fully onsite position in Minooka,IL.

About Aerotek

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance:

Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector:

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI):

We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.