Diesel Technician
STH Inc
Diesel TechnicianLooking for a rewarding field-based role where you deliver customer success and still make it home every night? Join us as a Diesel Technician!The Diesel Engine Service Technician is responsible for diagnosing, servicing, and maintaining diesel engines and related systems in a safe, efficient, and customer-focused manner. This role requires mechanical and technical expertise, a strong understanding of diesel systems (both mechanical and ECM-based), and the ability to communicate effectively with clients. The ideal candidate will demonstrate a commitment to safety, professionalism, continuous learning, and promoting the company's values and services while on-site.Job ResponsibilitiesDiagnose issues in diesel engines and associated control systems accurately.Communicate effectively with internal teams and customers to explain findings and recommendations.Perform all tasks following strict safety protocols and company procedures.Complete time sheets, paperwork, and submit clear photos of completed work on the same day.Maintain clean and safe work environments—leaving job sites in better condition than found.Represent and promote the business to generate additional service opportunities.Use proper PPE and adhere to all safety requirements during service tasks.Participate in training and professional development sessions to continuously grow technical knowledge.Explain complex technical issues to customers in a clear, professional manner.Keep all relevant certifications current and compliant.Required QualificationsProven experience working with diesel engines, including both mechanical and ECM-controlled systems.Strong working knowledge of diesel engine components and their operations.Proficiency in using diagnostic tools and repair equipment.Experience in generator troubleshooting and preventative maintenance services (PMs).Excellent written and verbal communication skills.Strong organizational skills with the ability to complete documentation accurately and on time.Must be able to work independently while managing time effectively.High attention to detail and commitment to workplace safety standards.High School Diploma or Equivalency.Clean Driving Record.Preferred QualificationsAdvanced understanding of electrical systems within diesel engine platforms.Previous experience in a customer-facing field service role operating as a technician.Sales-oriented mindset, with a demonstrated ability to upsell PMs and additional service work.Track record of maintaining high customer service scores and productivity metrics.Familiarity with revenue tracking, call-back minimization, and productivity optimization.Strong problem-solving capabilities and mechanical aptitude.Our STH SummaryAt STH, we are proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate on the basis of race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.All qualified applicants will receive consideration for employment without regard to any of these protected classifications. If you require assistance or an accommodation during the application process, please let us know.We believe that diversity of backgrounds, experiences, and perspectives enhances our ability to create innovative solutions and better serve our customers. Join us in our mission to build a diverse and inclusive workplace where everyone feels valued and empowered.At STH, we empower our employees to RISE to their fullest potential by embracing our core values acronym:Respect: We treat everyone with dignity and fairness.Integrity: We act ethically and honestly in all our interactions.Solutions Provider: We are committed to being our customers solutions provider, we pride ourselves in holding expertise that benefit our employees and customers alike.Excellence: We strive for excellence in all that we do, fostering a culture of continuous improvement and achievement; externally and internally.These values guide us in creating a supportive and collaborative environment where each individual can contribute meaningfully and grow professionally. Join our team and discover the opportunities to RISE with us at STH!
$35 - $46 per hour
...Diesel Technician Looking for a rewarding field-based role where you deliver customer success and still make it home every night? Join us as a Diesel Technician! The Diesel Engine Service Technician is responsible for diagnosing, servicing, and maintaining diesel...SuggestedHourly payNight shift$25 - $40 per hour
...Beltway Companies is searching for a Full-Time Diesel Technician to join our team! Pay Range of $25 - $40 per hour based on experience Benefits: - Health, Dental and Vision Insurance offered after 60 days employment - Company Match 401k after 6 months...SuggestedHourly payFull timeImmediate startRelocation package- ...our nation's Veterans by offering career opportunities that value military training, discipline, and technical expertise. As a Diesel Technician , you will leverage the skills acquired during your military service to diagnose, repair, and maintain diesel engines and...Suggested
- ...Diesel TechnicianWe are proud to support our nation's Veterans by offering career opportunities that value military training, discipline, and technical expertise. As a Diesel Technician, you will leverage the skills acquired during your military service to diagnose, repair...Suggested
$25 - $45 per hour
...Diesel Mechanic / Technician Johnson Truck Center Frederick, MD $25-$45/hour+ Training + Career Growth Johnson Truck Center, a subsidiary of Indel Power Group, is seeking Isuzu Truck Mechanic / Technicians to join our high-performing service team in Frederick...SuggestedTemporary workRelocation- ...Diesel Mechanic / TechnicianJohnson Truck Center, a subsidiary of Indel Power Group, is seeking Isuzu Truck Mechanic / Technicians to join our high-performing service team in Frederick, MD.As an authorized Isuzu dealer, we provide technicians with direct access to OEM...Relocation
- An Equal Opportunity Employer including Disabled/Veterans We endeavor to make this site accessible to any and all users. If you would like to contact us regarding the accessibility of our website or need assistance completing the application process, please contact us: ...For contractorsInternshipWork at officeLocal areaImmediate start
- Support the maintenance and repair of trucks and/or trailers ensuring that equipment is available and in optimal operating condition. Work with the assistance of other mechanics or supervisors when performing technical and diagnostic repairs. JOB DUTIES AND RESPONSIBILITIES...Day shift
- ...interested in beginning a rewarding career as an Isuzu Service Technician. This opportunity is part of the Isuzu Veterans Apprenticeship... ...of the following areas: • Wheeled vehicle maintenance • Diesel mechanics • Heavy equipment maintenance • Automotive repair...Full timeApprenticeshipWork experience placement
- A long-established commercial truck dealership in Frederick, MD is hiring a Heavy-Duty Diesel Technician to diagnose and repair heavy-duty trucks. Ideal candidates bring diesel engine knowledge, electrical troubleshooting skills, and familiarity with diagnostic equipment...Full timeRelocationMonday to FridayFlexible hoursDay shift
$26.45 - $48.95 per hour
United Rentals, Inc. is seeking a Field Diesel Mechanic in Frederick, Maryland. In this role, you will perform safety maintenance and... ...to job sites, maintain paperwork, and assist in training technicians. The ideal candidate will have a high school diploma, 3-5 years...Hourly pay- STH LLC (dba STH) in Frederick, MD, seeks a Diesel Technician for a field-based, home-every-night position. You will diagnose, service, and maintain diesel engines and ECM systems, communicating findings to customers and internal teams. On-site work emphasizes safety, continuous...Hourly payNight shift
- STH LLC (dba STH) is seeking a field-based Diesel Engine Service Technician in Frederick, MD to diagnose, service, and maintain diesel engines and ECM systems. On-site role with a focus on safety, customer communication, and professional conduct. Benefits include a company...Daily paid
- United Rentals, Inc. is seeking an experienced Diesel Mechanic to perform maintenance and repair of complex equipment with minimal supervision, ensuring safety and high-quality service for customers. The role offers opportunities for growth within the Service Department...
$25 - $40 per hour
Beltway Companies, the largest commercial truck dealership in Maryland, is seeking a Full-Time Diesel Technician in Frederick, MD. The role demands a solid foundation in diesel engine diagnostics, maintenance, and repair, offering a pay range of $25 to $40 per hour based...Hourly payFull time$28.6 - $47.68 per hour
4010 - Frederick Recon - 8500 Progress Drive, Frederick, Maryland, 21701 CarMax, the way your career should be! Now offering up to a $7,500 Sign-On Bonus. Only candidates external to CarMax who are hired will qualify to receive the sign on bonus. Position...Hourly payFull timeLocal areaRelocation package$28.6 - $47.68 per hour
4010 - Frederick Recon - 8500 Progress Drive, Frederick, Maryland, 21701 CarMax, the way your career should be! Now offering up to a $7,500 Sign-On Bonus. Only candidates external to CarMax who are hired will qualify to receive the sign on bonus. Position...Hourly payFull timeLocal areaRelocation package- ...Job Description Job Description ~~Construction Equipment Mechanic - A Level Diesel Mechanic- must know all aspects of construction equipment, electrical, hydraulic.... problem solving, and over all service and maintenance of equipment. Heavy-equipment mechanic Analyzes...Monday to Friday
$32.65 - $48.95 per hour
...provider, come build your future with United Rentals! As a Diesel Mechanic - Experienced (Service Tech IV), you’ll use your skills... ...professional manner Assist in the training of lower level technicians as needed Maintain paperwork/electronic documentation of...Hourly pay- ...POSITION OVERVIEW JOB TITLE B-Level Automotive Technician REPORTS TO Operations Manager DATE 6/22/2026 DIVISION / DEPARTMENT Sales and Service Operations POSITION DETAILS JOB PURPOSE Perform diagnostics, maintenance, repair, and reconditioning...Full timeWork at officeMonday to Friday
$25 - $40 per hour
...Beltway Companies is searching for a Full-Time Body Shop Technician to join our team! Pay Range of $25 - $40 per hour based on experience Benefits: - Health, Dental and Vision Insura nce offered after 60 days employment - Company Match 401k after 6...Hourly payFull timeImmediate startRelocation package- An Equal Opportunity Employer including Disabled/Veterans We endeavor to make this site accessible to any and all users. If you would like to contact us regarding the accessibility of our website or need assistance completing the application process, please contact us: ...Day shift
- Dairy Maid Dairy, Inc. in Frederick, MD is seeking an experienced maintenance technician to service trucks and trailers, perform preventive maintenance, and handle basic repairs. You will use diagnostic tools and work with drivers to identify issues. Responsibilities include...Day shift
$28 - $40 per hour
Waste Management is seeking Diesel Mechanics to inspect, maintain, and repair diesel-powered garbage trucks and heavy equipment used for waste collection operations. Diesel Mechanics are responsible for diagnosing mechanical issues, performing preventative maintenance,...Hourly payFull timeRelocation packageShift workNight shiftAfternoon shift$26.45 - $48.95 per hour
...provider, come build your future with United Rentals! As a Field Diesel Mechanic (Service Tech III - Field Service), you’ll use your... ...ll have the potential to work towards higher levels of Service Technician and leadership roles in our Service Department. Like every...Hourly pay- Dairy-Maid-Dairy is seeking a fleet mechanic to perform basic maintenance, inspections, and minor repairs on trucks and trailers. You will diagnose issues with diagnostic tools and work with drivers to ensure accurate problem identification. The role requires a high school...Day shift
$26.45 - $48.95 per hour
...Field Diesel Mechanic (Service Tech III - Field Service)If you'd like the chance to make your mark with the world's largest equipment... ...ll have the potential to work towards higher levels of Service Technician and leadership roles in our Service Department. Like every member...Hourly pay- Job Description Job Description NTB / Mavis Tires & Brakes at Discount Prices - Automotive Mechanics NTB is proud to join the Mavis Tire family. We're looking for full-time Automotive Mechanics to join Team Mavis at one of our state-of-the-art automotive service...Weekly payFull timeImmediate start
$16 - $18 per hour
...Jiffy Lube Lower Bay Technician Jiffy Lube Lower Bay Technicians perform Jiffy Lubes' Signature Service Oil Change along with the upper bay technician to provide quick, efficient, and timely service. The Lower Bay performs under vehicle inspections and routine preventative...Full timeFlexible hours- ...Advancement Opportunities Flexible Scheduling Competitive Compensation Job Summary We are looking for an Automotive Technician to join our successful independent service center. As an Automotive Technician, you will be responsible for diagnosing and repairing...Flexible hours
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Diesel Technician. Be the first to apply!



