Mobile Diesel–Hydraulic Service Specialist

Location: St. Louis

Mobile Diesel–Hydraulic Service SpecialistA Day On the Road Sunup finds you rolling out in a well-equipped service vehicle, headed to a customer site in the St. Louis metro area. A call came in about a pressure drop on a hydraulic circuit—by 8:00 a.m. you’re on the floor, gauges connected, reading the schematic, and tracing the issue to a worn valve.

By midday, you’ve replaced the failed component, flushed the system, verified pressures, and documented the repair. The afternoon takes you to a second stop for scheduled PM on diesel-driven rotating equipment. You finish with a run-up test, brief the customer on findings, log everything in the work order, and head home. Some days you’ll stay over for a project outside the metro, but most nights you sleep in your own bed.

What You’ll Own On-site troubleshooting, diagnostics, maintenance, and repair of complex mechanical equipment powered by diesel engines and hydraulic systems.

Hands-on work with pumps, motors, bearings, shafts, seals, rotating assemblies, gearboxes, and mechanical drive components.

Use of testing tools, visual inspections, service literature, and hydraulic schematics to isolate faults and determine root causes.

Execution of preventive maintenance and scheduled services; identification of worn/failed parts and selection of appropriate corrective actions.

Removal, repair, installation, and alignment of mechanical and hydraulic components.

Startup, functional testing, and commissioning support after repairs or installations.

Clear, professional communication with customers about equipment condition, recommended work, and maintenance plans.

Accurate documentation of diagnostics, work performed, parts used, and test results.

Independent field work with access to technical support when needed.

Care and upkeep of company tools, service vehicle, and safety equipment; adherence to company and customer safety protocols.

Where You’ll Work Primarily in the field supporting customers across the St. Louis region and nearby territories, with periodic work in the company shop. Travel is largely regional; most service calls end back asional overnights occur based on project needs. This is not a full-time nationwide travel role.

Backgrounds That Fit Well We value mechanical troubleshooting above all. People thrive here from:

Heavy equipment service and construction equipment repair

Diesel engine repair and maintenance

Field service or road technician roles

Hydraulic service and industrial maintenance

Pumps, generators, agricultural equipment, and mobile equipment repair

What Helps You Succeed Proven experience diagnosing and repairing diesel-powered equipment.

Solid understanding of hydraulics—pumps, motors, hoses, cylinders, valves, and related components.

Comfort with mechanically complex systems and rotating equipment.

A troubleshooting-first mindset (don’t just swap parts—find root causes).Ability to read mechanical drawings, manuals, and hydraulic schematics.

Prior field service experience and confidence working independently at customer locations.

Strong mechanical aptitude and practical problem-solving skills.

Experience on our exact product lines is not required—if you bring solid diesel, hydraulic, heavy equipment, or industrial mechanical experience, we will train you on our equipment.

Why You’ll Want This Role Competitive compensation

Comprehensive health benefits with medical, dental, and vision

Retirement benefits

Paid time off and paid holidays

Company-provided tools and/or service equipment

Ongoing technical training and advancement opportunities

Stable, year-round workload

Exposure to a wide mix of equipment and challenges

Your Core Proficiencies Equipment Troubleshooting Diesel Engine Systems Diesel & Heavy Equipment Systems Hydraulic Systems & Components Equipment Diagnostics & Troubleshooting If you enjoy solving mechanical puzzles, working face-to-face with customers, and owning your day in the field, this role delivers challenge, variety, stability, and a pathway to grow your career with an industry leader.