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Diesel Mechanic

Airgas · Minooka, IL · $28.00–$35.00 an hour · Full time

Posted Aug 23, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about the hardest repair you've done. How did you figure it out?

What they are checking: Depth of real diagnostic experience beyond routine service work.

Tell me about a time you disagreed with a driver about whether a truck was safe to run.

What they are checking: Whether they will hold firm on safety calls even under pressure to get loads moving.

The schedule includes extended hours, nights, weekends and holidays on call. How do you handle that kind of schedule?

What they are checking: Whether they are realistic about the on-call demands the posting describes.

What would you do

You're on call and a driver breaks down at night with a load. What do you do?

What they are checking: How they handle on-call emergencies and decide between roadside repair and a tow.

How do you keep up with preventive maintenance schedules across a fleet when breakdowns keep pulling you away?

What they are checking: Whether they protect PM work, which prevents the next round of breakdowns.

About the work

This shop supports bulk cryogenic logistics. What experience do you have with heavy trucks and trailers, and what diagnostic tools do you use?

What they are checking: Whether their diesel experience and tool skills match tractor and tanker fleet work.

Walk me through how you'd diagnose a truck that's throwing an aftertreatment fault and going into derate.

What they are checking: Their troubleshooting method on modern emissions systems, a common cause of fleet downtime.

What do you know about DOT inspection requirements, and how do you make sure a truck is road-ready?

What they are checking: Whether they understand compliance inspections that keep fleet trucks legal and safe.

What extra precautions would you take working around a trailer that hauls cryogenic liquid?

What they are checking: Safety awareness around extremely cold liquids and pressurized tanks.

How do you document a repair so the next mechanic or the fleet manager knows exactly what was done?

What they are checking: Record-keeping habits that support compliance and good maintenance history.

Practice this interview out loud.

Offer builds a real interview for this exact role at Airgas from your resume and this job description, asks the questions one at a time, and tells you what landed. The first one is free.

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The full job description

As published by Airgas.

R10085763 Diesel Mechanic (Open) Location: Minooka, IL (AMG) - Bulk cryo logistics How will you CONTRIBUTE and GROW? We are committed to building a diverse and inclusive workplace that embraces the unique perspectives of our employees, our customers, patients, community stakeholders, and cultures across the world. We believe that a variety of backgrounds makes our team stronger and more innovative. At Airgas, we RESPECT, HONOR and VALUE diversity. Airgas is Hiring for a Diesel Mechanic Minooka, IL.! We are looking for you ! • Sign-On Bonus $5K, paid out in increment • Pay Range: $28-$35 per hour. (Depending on experience and expertise) • Quarterly Incentive Bonus • $2000 Driver Referral Bonus (unlimited) • Travel: 10% • Work Schedule: Ability to work extended hours/shift work as business needs dictate. On call nights, weekends and holidays as required. • Comprehensive Family Benefits: Airgas offers a full benefits package designed to support your whole life, including Medical, Dental, Vision, Life, AD&D, and Disability Insurance. • Support for Parents: We offer a 14-week paid child birth benefit to support growing families. • Future Security: 401(k) Retirement Plan with company match, Tuition Assistance, Paid Holidays, Vacation, and Sick time. • Early Access: Your benefits start after just 30 days of employment. Recruiter: Janice Garcia / janice.garcia@airgas.com / (346) 479-5075 As a key member of the maintenance team, you will be responsible for the inspection, repair, and preventative maintenance of our fleet, including tractors, trailers, and specialized company equipment. Your primary goal is to ensure all assets remain safe, reliable, and fully compliant with DOT regulations and internal Airgas Merchant Gases procedures. • The primary function of this job is to diagnose and repair highway delivery equipment including hydraulic pumping and product transfer pump, develop and implement solutions to specific problems within the supply chain and logistics environment and troubleshoot/repair diesel tractors, cryogenic trailers, tube trailers and associated equipment in accordance with Airgas policies/procedures and DOT regulations. • You will perform preventive maintenance, equipment upgrades, read/interpret equipment condition reports, repair orders, communicate with supervisor/operator for clarification of problems and discuss preventive techniques with operators to minimize future repairs. You will also promote safety of all employees as first priority, processes/products towards zero defects. ________________________ Are you a MATCH? ​​ Required Qualifications • 2+ years experience in highway equipment maintenance • Experience with a variety of basic hand, power tools and equipment. • Must have own hand tools • Must be able to communicate in English, both verbally and written; ability to read/understand English Preferred Qualifications • High school diploma or GED equivalent; technical school classes preferred • Basic knowledge of transportation regulations • Class A CDL with HazMat; DOT brake certification preferred (Not Required) • Computer literacy; Google Chrome, TMT, on-board OEM computer diagnosis systems • Someone with solid diagnostic experience in ABS and DEF systems, including maintenance software programs, is driven by results and could excel in the office and on the shop floor. ABS, DEF and experience utilizing maintenance programs is in addition to all other requirements • Cryogenics exposure/experience Employee Benefits: Click Here ________________________ Benefits We care about and support our Airgas Families. This is evident not only through our competitive compensation but also through a comprehensive benefits package that includes medical, dental, and vision plans, short-term and long-term disability, life and accidental death and dismemberment (AD&D) insurance, Employee Assistance Program (EAP), pre-tax commuter transportation benefit, parental leave, vacation, sick time, floating holidays, jury duty and funeral/bereavement leave, and paid holidays for all eligible full-time employees. Additionally, we offer our eligible employees a 401k plan with company matching funds, tuition reimbursement, discounted college tuition for eligible employees’ dependents, and an Airgas Scholarship Program for dependent children. Associates who are members of collective bargaining units should review their bargaining agreement to determine whether they are eligible for some or all of the benefits described here and to see any special terms or conditions for eligibility. _________________________ Your DIFFERENCES enhance our PERFORMANCE At Airgas, we are committed to building a workplace that embraces the diversity of our employees, our customers, patients, community stakeholders and cultures across the world. We welcome and consider applications from all qualified applicants, regardless of their race, gender, sexual orientation, religion, disability or any other protected characteristic. We strongly believe a diverse organization opens up opportunities for people to express their talent, both individually and collectively and it helps foster our ability to innovate by living our fundamentals, acting for our success and creating an engaging environment in a changing world. _________________________ About Airgas Airgas, an Air Liquide company, is a leading U.S. supplier of industrial, medical and specialty gases, as well as hardgoods and related products; one of the largest U.S. suppliers of safety products; and a leading U.S. supplier of ammonia products and process chemicals. Through the passion and diversity of its 18,000 associates, Airgas fosters a culture of safety, customer success, sustainability and innovation. Airgas associates are empowered to share ideas, take initiative and make decisions. Airgas is a subsidiary of Air Liquide, a world leader in gases, technologies and services for industry and healthcare. Present in 60 countries with approximately 66,500 employees, Air Liquide serves more than 4 million customers and patients. Join us for a stimulating experience: At Airgas, you matter and so does the work you do. As a member of our team, you play an important role in the success of your team, making sure our products are created sustainably and delivered safely and efficiently. In turn, you’ll find a welcoming workplace where you’re valued for who you are and where you can fill your potential while growing a fulfilling career — whatever path you choose. _________________________ Equal Employment Opportunity Information We are an equal opportunity employer. We welcome all qualified applicants regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other protected characteristic. Airgas, an Air Liquide Company is a Government contractor subject to the Vietnam Era Veterans’ Readjustment Assistance Act of 1974 and Section 503 of the Rehabilitation Act of 1973. Airgas does not discriminate against qualified applicants with disabilities, and is committed to providing reasonable accommodations to the known disabilities of such individuals so as to ensure equal access to benefits and privileges of employment. If you are an individual with a disability and would like to request a reasonable accommodation as part of the employment selection process, please contact us by email at us-accommodationrequest@airgas.com. _________________________ California Privacy Notice

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