About Us

Welcome to C. M. T. S., your trusted heavy-duty diesel repair shop located in Charlton, MA. With over three decades of experience in the industry, we have established ourselves as a reliable and reputable provider of diesel repair services. 

C. M. T. S. was founded way back in 1990 by Jennifer Leo and her partner. Beginning with a strong determination and a desire to learn, Jennifer picked up the trade from her partner as well as from the clients she served. Ever determined to see her business thrive, Jennifer invested all earnings back into the shop.

Our humble beginnings saw us operating from a modest single garage with just one talented technician to tend to the needs of our growing customers. However, as demand for our services soared, we knew it was time to spread our wings. In 1995, a twist of fate led us to Charlton, MA, where we found a new location, and that’s where you can still find us to this day. We now own the premises, which proudly boasts five spacious bays full of cutting-edge equipment and two world-class mechanics with decades of experience. 

In a remarkable milestone, Jennifer bought out her partner in the company's 20th year, marking an important turning point in C. M. T. S.'s journey. Now, with over 33 years in the game, we take pride in our rich history and the expertise we have on our team.

We strongly believe in the power of teamwork and foster a close-knit community within our shop. As a small and passionate team, we prioritize building a warm and welcoming atmosphere where every team member is treated with the utmost respect and professionalism. We firmly believe that a positive work environment directly translates into an exceptional service experience for you, our valued customer.

We know just how annoying it can be to have things change at the last minute, which is why we have an unwavering commitment to honoring our appointments, no matter what. We pre-assess vehicles while they are being worked on, allowing us to order the necessary parts in advance, saving you time and minimizing downtime. We also offer rare services in the Charlton, MA, area, such as RV repairs and heavy-duty alignment, making us the go-to destination for these specialized needs.

Whether it's servicing school buses during their off-season, ensuring efficient HVAC systems in the summer, or providing reliable heating solutions in the winter, we have you covered. And when spring arrives, we specialize in preparing RVs for the exciting journeys ahead.

At C. M. T. S., we are committed to delivering exceptional diesel repair services with a focus on customer satisfaction and strive to always provide an outstanding experience, from the moment you walk through our doors to the time you drive away in your perfectly functioning vehicle.

Choose C. M. T. S. for all your heavy-duty diesel repair needs. Contact us today to schedule an appointment or to learn more about our services. We look forward to serving you!

Customer Reviews

Check out what our customers have to say about our services.

"Had some truck troubles so pulled in off the Pike...They Diagnosed my problem, were kind enough to take the time to get me back on my route. Very knowledgeable and extremely friendly. Thank you guys I'd give them 6 stars if I could!"
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Andrew Lewis

"This is my go to place for repairs. Very hard working talented group here that can fix just about anything. Been dealing with them for many years now and I can always count on excellent and friendly service here. They also do some fantastic historical record keeping to keep you up date with exactly what’s going on with your equipment."
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jbgearhead, Local Guide

"Excellent service and very friendly place to get my RV serviced."
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Morio Kubota

Contact us

Choose C. M. T. S. for all your heavy-duty diesel truck repair needs. Contact us today to schedule an appointment at our truck repair shop in Charlton, MA. We look forward to getting your truck moving again!