Diesel Mechanic: career path and pay in the US
Where a Diesel Mechanic goes next, what each step typically pays in the United States, and how exposed the path is to AI replacement. 4 steps, from Diesel Mechanic / Diesel Technician to Diesel Service Manager / Shop Owner.
Also for the United Kingdom: Diesel Mechanic in the UK
The path
Step 1 · 0 to 2 years
Diesel Mechanic / Diesel Technician
$50K to $75K
Typical US pay for this job title, retrieved September 2026.
What this step adds
Credentials that help: ASE Diesel Certification (optional) - US, IMI Level 2 (optional) - UK/EU, Health & Safety Certification (required) - Global.
Step 2 · 2 to 7 years
Senior Diesel Mechanic / Master Technician
$55K to $85K
Typical US pay for this job title, retrieved September 2026.
What this step adds
Credentials that help: ASE Diesel Certification - US, IMI Level 3 - UK/EU, Health & Safety Certification - Global.
Step 3 · 7 to 12 years
Diesel Shop Foreman / Service Manager
$65K to $100K
Typical US pay for this job title, retrieved September 2026.
What this step adds
Credentials that help: ASE Diesel Certification - US, IMI Level 4 - UK/EU, Health & Safety Certification - Global, Supervisory Skills Certification (optional) - Global.
Step 4 · 12+ years
Diesel Service Manager / Shop Owner
$95K to $145K
Typical US pay for this job title, retrieved September 2026.
What this step adds
Credentials that help: ASE Diesel Certification - US, IMI Level 4 - UK/EU, Health & Safety Certification - Global, Business License - Global.
Exposure and pay along the path
Exposure to AI, now to later
24% → 24%
Stays level across the path. Lower is better.
Typical pay, now to later
$50K to $75K → $95K to $145K
US estimates by job title, Glassdoor, Indeed and PayScale US. Indeed publishes a hourly average for Diesel Mechanic ($30.46); this band converts it at 40 hours a week. Indeed publishes a hourly average for Senior Diesel Mechanic ($34.32); this band converts it at 40 hours a week.
What the work involves
Diagnose, adjust, repair, or overhaul buses and trucks, or maintain and repair any type of diesel engines. Includes mechanics working primarily with automobile or marine diesel engines.
Skills that matter most
- Critical Thinking
- Speaking
- Active Listening
- Monitoring
- Reading Comprehension
- Active Learning
Knowledge areas
- Mechanical
- Transportation
- Education and Training
- English Language
- Public Safety and Security
- Mathematics
Education people bring
- Post-Secondary Certificate: 40%
- High School Diploma or the equivalent (such as a GED): 37%
- Less than a High School Diploma: 1%
Job Zone 3, job Zone Three: Medium Preparation Needed. Previous work-related skill, knowledge, or experience is required for these occupations. For example, an electrician must have completed three or four years of apprenticeship or several years of vocational training, and often must have passed a licensing exam, in order to perform the job.
Other paths from here
- Auto Mechanic
- Fleet Manager
- Service Manager
- Business Owner
More Skilled Trades paths in the US
Related occupations in O*NET: Mobile Heavy Equipment Mechanics, Except Engines, Rail Car Repairers, Automotive Service Technicians and Mechanics, Motorboat Mechanics and Service Technicians, Outdoor Power Equipment and Other Small Engine Mechanics.
Your own role
How exposed is your job, task by task? Free score in under a minute.
SourcesSalary bands: Glassdoor, Indeed and PayScale US, US national averages by job title, retrieved September 2026Skills, knowledge and education: O*NET 31.0 Database
This page includes information from the O*NET 31.0 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA). Used under the CC BY 4.0 license. O*NET® is a trademark of USDOL/ETA. CC BY 4.0
Salary estimates by job title from Glassdoor, Indeed and PayScale, retrieved September 2026. Each band runs from 20% below to 20% above the reported average, rounded to $5K. Exposure percentages and the skills listed under each step are this app's own editorial ratings, not published data.