Diesel Mechanic

Diesel MechanicTrillium is seeking an experienced Head Diesel Mechanic to lead and manage our shop operations in Menomonee Falls, WI. This leadership role is directly responsible for maintaining, servicing, and managing a dedicated fleet consisting of 8 Peterbilt trucks with Caterpillar (CAT) engines and 29 trailers essential to our time-sensitive catering logistics operations. If you are a self-motivated lead mechanic who thrives on keeping a shop organized, maintaining equipment reliability, and running a seamless fleet operation, we want to talk to you!Responsibilities: Shop Leadership & Operations: Manage day-to-day shop activities, schedule maintenance, track work orders, and manage parts inventory for the fleet. Engine & Fleet Maintenance: Perform diagnostic, troubleshooting, repair, and overhaul work on Peterbilt trucks equipped with Caterpillar engines. Trailer & Equipment Service: Inspect, repair, and perform preventive maintenance (PMs) on 29 trailers, including air brakes, lighting, hydraulics, structural components, and auxiliary transport systems. Preventive Maintenance: Design and execute routine PM schedules to prevent vehicle breakdowns and guarantee zero downtime during critical catering delivery windows. Diagnostics & Troubleshooting: Use CAT Electronic Technician (ET) software and computer-based diagnostic tools to identify and resolve mechanical and electrical faults. Safety & Compliance: Ensure all fleet units comply with DOT safety standards, state regulations, and food-transport cleanliness protocols. Keep a safe, clean, and organized shop floor. Record Keeping: Track labor time, parts usage, and detailed service records for every unit in the fleet management system.Pay rate is $38.00 / hour. Schedule is 1st Shift | Monday – Friday (Occasional overtime during peak demand periods).Experience: 5+ years of hands-on heavy-duty diesel technician experience, with proven expertise in Caterpillar engines and Peterbilt chassis. Previous shop lead or head mechanic experience is strongly preferred. Technical Proficiency: Deep understanding of diesel engines, CAT diagnostic tools, heavy-duty transmissions, electrical diagnostics, air brakes, and trailer mechanics. Licensing & Certifications: Valid driver's license with a clean driving record; Class A CDL is highly preferred (or ability to obtain). ASE or CAT certifications are a major plus. Tools: Must possess a complete personal hand and power tool set appropriate for heavy-duty truck repair. Ability to lift up to 50–75 lbs.Trillium has been recruiting and placing professionals for over 30 years. From Fortune 100 companies to small businesses, our philosophy remains the same: to achieve excellence by providing quality employees and an uncompromising level of service. We believe in honesty, integrity, and a simple philosophy of providing value to our customers and our employees. We strive to be unsurpassed in the recruitment and placement of quality and skilled professionals. Trillium is an Equal Opportunity Employer.Qualified applications with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for the employers and the California Fair Chance Act.By applying to this job, I agree to receive electronic communications including SMS text and email regarding future opportunities, referral bonus incentives, and other promotions from Trillium. You may opt out at any time from future communications by responding STOP to any electronic communication. You may view our full privacy policy at offers a comprehensive benefit package that includes the ability to participate in health insurance and retirement plans, paid holidays, state required leave, and other leave, if applicable. Trillium's offerings are dependent on the state in which the assignment is located, length of time worked, and may change depending on assignment. Benefit packages for direct hire placements vary based on the client company.Contact Us if you have any questionsContactBrandon Carter Have a question about this job?