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Diesel Service Technician

Mulholland Energy Services
Oklahoma, OK Full Time
POSTED ON 3/13/2026
AVAILABLE BEFORE 5/13/2026

Overview
Join our dynamic team as a Diesel Service Technician in Oklahoma City, OK., we offer competitive pay, sign-on bonus and an excellent benefits package!

In this energetic role, you will diagnose, service, and repair diesel engines and heavy machinery, ensuring optimal performance and safety. We value proactive problem-solvers who thrive on hands-on work, has strong mechanical knowledge, attention to detail and delivering exceptional customer service.

Responsibilities

  • Perform diagnostic tests and troubleshooting on diesel engines and related components
  • Conduct routine maintenance, including oil changes, filter replacements, tire service, and inspections to ensure equipment reliability.
  • Repair or replace engines, transmissions, brakes, steering systems, and electrical components
  • Maintain accurate records of all repairs, services, and parts used
  • Follow all company safety procedures and industry best practices
  • Inspect and test equipment to ensure proper operation
  • Collaborate with team members and supervisors to maintain workflow efficiency
  • Respond to emergency service calls when needed

Requirements

  • Valid driver’s license
  • Experienced Diesel Tech with at least 5years of heavy-duty repair, preventative maintenance and service.
  • Strong mechanical knowledge of heavy equipment operation including Cummins Engines, John Deere, GMC , Ford and small engines and tractors-trailers.
  • Skilled in automotive diagnostics and electrical troubleshooting.
  • Knowledge on the Kenworth, Peterbilt, and Western Star Chassis
  • Certifications related to mechanics are a plus
  • Strong problem-solving and communication skills
  • Ability to work independently as well as part of a team in a fast-paced environment.
  • Physical exertion required. Including, but not limited to, walking, standing, stooping, bending and lifting up to 50 pounds.

Join our team as a Diesel Tech, where your expertise will contribute to maintaining high standards of safety and performance in our fleet.

Benefits:

  • 401(k)
  • 401(k) matching
  • Dental insurance
  • Employee assistance program
  • Employee discount
  • Health insurance
  • Life insurance
  • Paid time off
  • Referral program
  • Retirement plan
  • Vision insurance

People with a criminal record are encouraged to apply

Experience:

  • Diesel Tech: 3 years (Required)

Work Location: In person

Salary.com Estimation for Diesel Service Technician in Oklahoma, OK
$50,510 to $63,443
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