Jobs › Alliance Ground International

Heavy Duty Diesel Mechanic

Alliance Ground International · Chicago, IL · Full time

Posted Sep 25, 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 a time you had to work on brakes or transmission on a vehicle you weren't familiar with.

What they are checking: Whether they adapt to the wide variety of airport service equipment rather than one vehicle type.

Tell me about a repair you got wrong. What did you learn?

What they are checking: Whether they own their mistakes honestly and use them to improve.

How do you document your work so the next mechanic knows what was done?

What they are checking: Whether they keep records that help the whole shop, not just themselves.

What would you do

A belt loader breaks down on the ramp right before a departure. How do you handle the call?

What they are checking: Whether they respond quickly and understand that equipment downtime can delay a flight.

How do you keep yourself safe when working on equipment near active aircraft and moving vehicles?

What they are checking: Whether they understand ramp hazards and take them seriously, since the company emphasizes safety.

This is a round-the-clock operation with flexible schedules. How do you handle shift changes and working weekends?

What they are checking: Whether they can reliably work the varied hours that airport ground support requires.

About the work

Walk me through how you'd troubleshoot a diesel tug that cranks but won't start.

What they are checking: Whether they work through fuel, air and compression in a methodical order rather than guessing.

Tell me about the toughest hydraulic problem you've fixed. How did you track it down?

What they are checking: Whether they have real experience with hydraulic systems, which run much of the airport's ground equipment.

What's your experience with MIG and arc welding? Tell me about something you fabricated or repaired.

What they are checking: Whether they can handle the fabrication work the posting lists, not just parts swapping.

How do you approach an electrical fault that comes and goes?

What they are checking: Whether they have the patience and method to catch intermittent faults instead of giving up.

Which ASE certifications do you have or are working toward?

What they are checking: Whether they have formal proof of skill, which the posting lists as preferred.

Practice this interview out loud.

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The full job description

As published by Alliance Ground International.

Job Description: Are you an experienced mechanic who enjoys working on a variety of auto and diesel engines? The Ground Service Mechanic is responsible for general troubleshooting and repair work on gas/diesel engines and associated systems, electrical systems, transmissions, gears, brakes, and all other systems associated with airport service equipment. Ideal candidates will have at least two years of experience with troubleshooting and repair on gas/diesel engines, hydraulic systems, electrical systems, transmission/rear end, basic chassis/brakes, as well as fabrication skills (MIG and Arc welding/cutting). ASE Certification preferred. AGI provides paid on-the-job training, advancement opportunities, and safety incentive bonuses. AGI is an aviation services company operating in more than 50 cities across North America. We employ over 3,000 people servicing nearly 200 airline customers every day! Our aviation roots span 45 years and our strong reputation in ground services and hospitality are the foundation of our success. We are committed to providing the highest level of quality service and continuing our track record of outstanding safety. As we continue to grow, we are looking for only the best in the industry. The sky is the limit! As an AGI Mechanic you will: • Provide prompt response to equipment service requests to troubleshoot and repair: vehicles & belt loaders (unleaded, diesel, and propane engines), lavatory service trucks, air conditioner carts, ground power units, and more. • Perform and track preventative maintenance for each piece of equipment. • Work with station management to help control budget and order parts and supplies. To be an AGI Mechanic you must: • Be at least 18 years of age and possess a High school diploma, GED, or work experience equivalent. • Possess a valid driver’s license with a clean driving record. • Be able to pass a drug screen and obtain airport security clearance, which includes an extensive 10-year employment, criminal record, and residence background check. • As an AGI Mechanic you must be able to: • Lift up to 70 pounds (32 kg) in confined spaces on a regular basis. • Climb, bend, kneel, crawl and stoop on a frequent basis and for extended periods. • Work outside in all types of weather, around jet and machinery noises. Airlines are 24/7, so we need our team members to be flexible to work various shifts including nights, weekends, and holidays. The successful AGI team member brings their “A” game every day with energy and enthusiasm, respect for their team, and the highest regard for safety! $30/hr. -$38/hr. Alliance Ground International is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. AGI is committed to equal opportunity employment regardless of race, color, ancestry, religion, sex, national, origin, sexual orientation, age, citizenship, marital status, disability or veteran status.

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