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Diesel Mechanic Trainee Jobs in Washington (NOW HIRING)

Service Technician

Jessup, MD · On-site

$29 - $31.05/hr

Coach/tutor junior colleagues and trainees as necessary * Conduct self at all times in a way that ... Working knowledge of diesel engines and hydraulic drive systems * Fluent in local language and ...

Field Service Technician

Jessup, MD · On-site

$38.05 - $44.25/hr

Coach/tutor junior colleagues and trainees as necessary * Conduct self at all times in a way that ... Working knowledge of diesel engines and hydraulic drive systems * Fluent in local language and ...

Coach/tutor junior colleagues and trainees as necessary * Conduct self at all times in a way that ... Working knowledge of diesel engines and hydraulic drive systems * Fluent in local language and ...

Field Service Technician

Jessup, MD · On-site

$38.05 - $44.25/hr

Coach/tutor junior colleagues and trainees as necessary * Conduct self at all times in a way that ... Working knowledge of diesel engines and hydraulic drive systems * Fluent in local language and ...

Service Technician

Jessup, MD · On-site

$29 - $31.05/hr

Coach/tutor junior colleagues and trainees as necessary * Conduct self at all times in a way that ... Working knowledge of diesel engines and hydraulic drive systems * Fluent in local language and ...

Field Service Technician

Jessup, MD · On-site

$38.05 - $44.25/hr

Coach/tutor junior colleagues and trainees as necessary * Conduct self at all times in a way that ... Working knowledge of diesel engines and hydraulic drive systems * Fluent in local language and ...

Diesel Mechanic Trainee information

See Washington salary details

$16

$32

$43

How much do diesel mechanic trainee jobs pay per hour?

As of Aug 23, 2026, the average hourly pay for diesel mechanic trainee in Washington is $32.02, according to ZipRecruiter salary data. Most workers in this role earn between $27.21 and $35.96 per hour, depending on experience, location, and employer.

What is a diesel mechanic trainee?

A Diesel Mechanic Trainee is an entry-level worker who is learning how to inspect, maintain, and repair diesel engines, commonly found in trucks, buses, and heavy equipment. Trainees work under the supervision of experienced diesel mechanics to gain hands-on experience and develop technical skills. Their duties often include assisting with routine maintenance, troubleshooting engine problems, and learning to use specialized tools and diagnostic equipment. Over time, trainees build the knowledge and experience needed to become fully qualified diesel mechanics.

What are the key skills and qualifications needed to thrive as a diesel mechanic trainee?

To thrive as a Diesel Mechanic Trainee, you need a basic understanding of diesel engine systems, mechanical aptitude, and typically a high school diploma or equivalent. Familiarity with diagnostic tools, hand and power tools, and basic computer systems is often required, while entry-level certifications like ASE Student Certification can be beneficial. Strong attention to detail, willingness to learn, teamwork, and effective communication help trainees excel in hands-on environments. These skills and qualities are essential for maintaining safety, ensuring accurate repairs, and building a successful foundation for advancement in the field.

What types of support and training can a diesel mechanic trainee expect during the initial months on the job?

As a Diesel Mechanic Trainee, you can expect a structured onboarding process that includes hands-on training, shadowing experienced mechanics, and participating in safety briefings. Many employers provide mentorship programs where trainees work closely with senior technicians to learn diagnostic procedures, tool usage, and maintenance protocols. You'll likely receive ongoing feedback and may attend workshops or online courses to build foundational technical knowledge. This supportive environment is designed to help you gradually take on more complex tasks and develop confidence in your role.

What is the difference between Diesel Mechanic Trainee vs Diesel Mechanic?

AspectDiesel Mechanic TraineeDiesel Mechanic
CertificationsMay require basic ASE certifications or on-the-job trainingTypically requires ASE certifications and more advanced credentials
Work EnvironmentTraining environment, often in repair shops or garagesFull-time mechanic working on vehicles and equipment
Job ResponsibilitiesLearning repair procedures, assisting senior mechanicsPerforming repairs, diagnostics, and maintenance independently

In summary, a Diesel Mechanic Trainee is in the learning phase, focusing on gaining skills and certifications, while a Diesel Mechanic is a fully qualified professional performing repairs and maintenance independently.

How fast can you become a diesel mechanic trainee?

Becoming a diesel mechanic trainee can take a few weeks to a few months, depending on the program or employer requirements. Many trainees start after completing a high school diploma or equivalent, and some may pursue technical training or certifications that can accelerate their readiness for the role. Hands-on experience and familiarity with tools are also important for progressing quickly in this field.

What are the most commonly searched types of Diesel Mechanic jobs in Washington?

The most popular types of Diesel Mechanic jobs in Washington are:

What are popular job titles related to Diesel Mechanic Trainee jobs in Washington?

For Diesel Mechanic Trainee jobs in Washington, the most frequently searched job titles are:

What cities in Washington are hiring for Diesel Mechanic Trainee jobs?

Cities in Washington with the most Diesel Mechanic Trainee job openings:

Infographic showing various Diesel Mechanic Trainee job openings in Washington as of August 2026, with employment types broken down into 85% Full Time, 6% Part Time, 2% Temporary, 5% Contract, and 2% Nights. Highlights an 94% Physical, and 6% Remote job distribution, with an average salary of $66,594 per year, or $32 per hour.

Wastewater Maintenance Technician/Trainee (Industrial Mechanic)

Arlington County, VA

Arlington, VA • On-site

$47K - $100K/yr

Full-time

Medical, Dental, Retirement, PTO

Re-posted 13 days ago


Job description


Important Notice: Arlington County requires all applicants to thoroughly complete each section of the application, including prior job responsibilities, duties, and supplemental questions. While you may attach a resume, it will not replace a completed application. Incomplete applications will not be considered.
Do you have hands-on experience with engines, pumps, valves, hydraulics, or industrial equipment? If so, we may have the perfect opportunity for you! Arlington County's Department of Environmental Services (DES) is seeking skilled mechanics and maintenance professionals to join the Water Pollution Control Plant (WPCP) as Wastewater Maintenance Technician/Trainees (WMT) through a paid apprenticeship program! The WPCP is a state-of-the-art, highly automated advanced wastewater treatment facility capable of treating more than 40 million gallons of wastewater per day. Selected candidates will participate in a structured four-year job training/work apprenticeship program, which offers a career path from Wastewater Maintenance Technician/Trainee to the highest-level Wastewater Maintenance Technician at full performance.
The apprenticeship program includes:
  • Extensive County-paid technical courses and training using the TPC training system, such as wastewater systems overview, safety, CMMS, WEF pump computer, backflow preventer, crane truck/backhoe/skid loader/rigging/overhead crane operation, laser alignment, vibration analysis, root cause failure, oil analysis, and other required trainings;
  • A structural and pipe welding certification and CDL License;
  • Defined expectations of accomplishment at each level or subject to separation from training; and
  • A compensation plan based upon the achievement of new skills through comprehensive testing, certification, and demonstrated application of skills.

Responsibilities
Specific duties include:
  • Inspecting, diagnosing, and repairing industrial mechanical equipment including pumps, blowers, compressors, valves, gearboxes, conveyors, sluice gates, and diesel/gasoline engines using diagnostic tools, blueprints, and factory specifications;
  • Performing horizontal and vertical welding, fabrication, and brazing using acetylene, arc, MIG, and TIG welders on ferrous and nonferrous metals; making precision cuts using band saws and plasma cutters;
  • Evaluating equipment condition and maintenance needs by analyzing age, maintenance history, operational data, and life expectancy to develop project plans for predictive, preventive, and corrective action;
  • Assessing project scope for repair, replacement, and installation work - including resource needs (equipment, personnel, budget) and coordinating or monitoring contractor performance and quality of work; and
  • Operating and maintaining hand and power tools, precision instruments, rigging equipment, and shop machinery including grinders, hydraulic presses, pipe threaders, calipers, and micrometers.

The Full Performance Maintenance Technician is responsible for technical, skilled trades and project management work. This includes installing, maintaining, and renovating complex industrial systems and equipment in the WPCP, along with Water and Sewer Lift Stations maintained, and managed in DES.
The ideal candidate will have experience:
  • Independently diagnosing mechanical problems and determining repair solutions with minimal supervision;
  • Working in fast-paced environments where priorities shift quickly - balancing planned maintenance with emergency response; and
  • Collaborating across trades and work groups to complete projects safely and on schedule.

Qualifications
Minimum Qualifications: Selected Candidates will be placed at the level commensurate with their education and experience levels (Multiple vacancies)
Wastewater Maintenance Technician Trainee - Apprentice Level 1:
  • High school diploma or GED or the equivalent; and
  • One (1) year of mechanical experience.
  • Licenses/Certifications: None required at hire. Must obtain a valid Class B Commercial Driver's License (CDL) within the first year of employment.

Wastewater Maintenance Technician Trainee Apprentice Level 2:
  • Completion of Apprentice Level 1 requirements; and
  • One (1) year of experience in wastewater maintenance.
  • Licenses: Forklift certification; First Aid and CPR; IMI WMT I License or equivalent; CDL Class B.

Wastewater Maintenance Technician Trainee Apprentice Level 3:
  • Completion of Apprentice Level 2 requirements; and
  • One (1) additional year of experience in wastewater maintenance.
  • Licenses: Backflow preventer license; IMI WMT II License; CDL Class B; Plate and pipe welding certification.

Wastewater Maintenance Technician (Full Performance Level):
  • Three (3) years of progressively responsible experience in mechanical repair or the maintenance of a wastewater treatment facility;
  • Licenses: WMT III or equivalent; Forklift; First Aid/CPR; Plate and Pipe Welding; CDL Class B.

Substitution: A year of directly related technical school training beyond the high school level or a college degree in Engineering or a directly related field may be substituted for one year of the experience requirement.
Desirable Qualifications: Preference may be given to candidates with experience in one or more of the following:
  • Hands-on mechanical repair in automotive, diesel, heavy equipment, manufacturing, or military maintenance settings;
  • Troubleshooting and repairing pumps, motors, hydraulic systems, gearboxes, or engine components;
  • Working in industrial environments with exposure to heavy machinery, confined spaces, and safety protocols;
  • Welding experience (any discipline - MIG, TIG, arc, acetylene); and/or
  • Reading and interpreting blueprints, technical manuals, or equipment schematics.

Special Requirements
  • Background Check: A pre-employment criminal records check will be conducted. It will include checks of the following: criminal record, driving record, education, professional licensure, and credit history. You will be required to sign a release authorizing the County to obtain your background information.
  • Commercial Driver's License (CDL)/Driver's License: Applicant must possess and maintain a valid Class B CDL or must obtain within one year of employment for level 1, and applicant must authorize Arlington County to obtain, or provide a copy of official driving record. Any offer of employment may be contingent upon a favorable review of the applicant's driving record. Applicant must consent to Arlington County to obtain from previous employer's information required by DOT agency regulations concerning drug and alcohol testing information. Once hired, the employee will be subject to a Department of Transportation (DOT) drug screening at such times during employment as required by federal, state, and local standards and regulations.
  • Work Environment - Work is performed in an industrial environment and involves exposure to hazardous chemicals, strong odors, drafts, noise, dust, grease, and dirt, including extended periods of standing, walking, bending, and crouching. Incumbent is also required to lift light to very heavy objects and equipment, exerting up to 75 pounds of force occasionally and/or up to 50 pounds of force frequently, and/or up to 20 pounds of force constantly to move objects, and climb ladders and elevations of 100 feet. This position requires working outside for long periods of time with exposure to adverse weather conditions which includes rain, snow, wind, and temperature extremes.
  • Candidates selected for interview will be required to participate in a work simulation exercise. Candidates must also be able to pass a respirator fit test and work in confined spaces.
  • Please complete each section of the application including the supplemental questions. Your responses to the supplemental questions are required because they provide us with specific information necessary to evaluate your qualifications for this position. These responses are considered part of the selection process. A resume may be attached; however, it will not substitute for a completed application. Incomplete applications will not be considered. Please do not write "see resume" as a response to the questions.

Additional Information
Work Hours: 5:30 a.m. to 2:00 p.m., Monday through Friday. Must be available for holdover and/or call-back in emergency situations.
The Wastewater Maintenance Technician Apprenticeship Program is a multi-grade pay class within the Arlington County Government. The salary listed at the top of the announcement is reflective of the entry at the trainee level to the top of the full performance level. Entry pay and pay progression is based on meeting training, certification, licensing, and experience requirements.
Permanent status with the County is not obtained until completion of training and certification requirements for the full-performance position. All employees in the program must complete all stated requirements within the specified time frames, or they will be subject to separation from County employment.
This position is eligible for County government employee benefits that include health, dental, vacation and sick leave, commuter transportation subsidies, tuition reimbursement, as well as a generous retirement plan.
For more information on Arlington County's generous benefits and retirement plan, click here.
Arlington County is committed to advancing diversity, equity, access, and inclusion across all our services, activities, and programs. Learn more about our commitment.
This position is listed as "open continuous." Interested applicants are advised to submit their application as soon as possible. If your application is received later in the recruitment process, it may not be reviewed or considered. The application process will close when the position has been filled or when a sufficient number of qualified applications have been received.
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