Diesel Mechanic in Massachusetts: Salary, License Requirements, and How to Start

Repair and maintenance

Massachusetts employs 4,870 diesel mechanics, with a statewide median of $73,270 and wide variation by city and experience. Here is the real wage data, the exact Massachusetts licensing picture, and where to train.

What Diesel mechanics Earn in Massachusetts (May 2025)

Wages vary substantially by metro. Median annual pay for diesel mechanics in major Massachusetts markets:

What That Pay Is Worth in Massachusetts

Prices in Massachusetts run about 6% above the national average (cost-of-living index 105.8 vs a U.S. baseline of 100, 2024), so the $73,270 median is worth closer to $69,253 once higher local prices are factored in.

Job Outlook in Massachusetts (2024–2034)

Massachusetts is projected to grow diesel mechanics employment +5.1%, faster than the +2.4% projected nationally. The state expects about 440 openings a year, counting both growth and workers who retire or move on.

Massachusetts License and Certification Requirements

None required — ASE Medium/Heavy Truck certifications (T series) are the industry standard — regulated by the No Massachusetts state license required for diesel mechanics.

1. Massachusetts does not require a state license for diesel mechanics. Complete a diesel technology program at Springfield Technical Community College, Massasoit Community College, or employer OJT.
2. Earn ASE Medium/Heavy Truck certifications (T1–T8 series) and/or ASE Transit Bus certifications for MBTA-type work. CDL knowledge of diesel powertrain is valuable.
3. Apply to the MBTA (Massachusetts Bay Transportation Authority — one of the largest transit agencies in the US), school bus fleet operators, trucking companies at Logan/Conley Terminal, and construction equipment dealers across Massachusetts.

Official requirements: No Massachusetts state license required for diesel mechanics →

Training in Massachusetts

The MBTA's large bus and commuter rail fleet is a significant diesel mechanic employer — with strong union wages through TWU Local 589. Massachusetts' large school bus fleet (DESE school transportation contracts), construction equipment dealers (Milton CAT is Caterpillar's New England dealer), and freight carriers are other major employers.

Real training providers and registered apprenticeships in Massachusetts include:

• Benjamin Franklin Cummings Institute of Technology — Certificate / Associate
• Cape Cod Community College — Certificate / Associate
• Massachusetts Bay Community College — Certificate / Associate
• Massasoit Community College — Associate

Is This the Right Move for You?

Best for: People who like large, powerful machinery and want solid wages without a 4-year degree.

Think twice if: Grease, diesel exhaust, heavy components, and shop environments sound miserable rather than satisfying.

Why it's resilient: Diesel engines power trucks, buses, heavy equipment, and generators — hands-on diagnosis and repair that cannot be done remotely.

First Steps

Look for diesel technology programs at community colleges and vocational schools, or apply directly as a shop helper.

Frequently Asked Questions

Sources and Verification

Wage data: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (May 2025), Massachusetts statewide and metro estimates for SOC 49-3031. Licensing summary compiled from the No Massachusetts state license required for diesel mechanics (2026-06-11). Requirements change — always confirm current rules with the board and verify program costs and outcomes before enrolling.

BLS Occupational Outlook · O*NET Massachusetts wages · Massachusetts licensing/certification source

Employment projections: Projections Central / BLS Employment Projections (2024–2034); Cost of living: BEA Regional Price Parities.

Pay percentiles describe current workers, not entry-level offers; training costs and local demand vary, so verify locally before committing money or quitting a job.