Leonard Mast | Mast Service Center

Leonard Mast

Leonard Mast is the proud owner of Mast Service Center in Bremen and Etna Green.  Leonard started at a young age working on diesel engines. After many years and much more auto repair education, his first auto mechanic job was running a fleet with diesel trucks operating all over the U.S. for about 10 years.

In 2005, Leonard went out on his own, and Mast Service Center was born in Etna Green, and has steadily expanded its services and team. Now Mast Service Center has an additional location in Bremen, and a mobile services unit that will get a diesel mechanic to you if you’ve broken down on the side of the road. Leonard still does plenty of auto repair himself, but has also built up a great team of auto mechanics. Between them, there’s no auto repair task that’s too difficult for Mast Service Center.

Leonard is moving Mast Service Center ahead with great pride in the reputation for quality auto repair that it has built. They're looking forward to continuing to grow their services in Bremen and Etna Green and around the area. Above all else Leonard, and the rest of the auto mechanics here at Mast Service Center, want you to feel like you’re part of the family, and that you’re treated with respect and well taken care of. That family feeling that Leonard exudes shows through in the feedback we get from our customers, like this Google review from Eric:

“Needed my truck heater replaced. Was in and out in an hour and a half. Can't ask for better! Price was fair and the people were great!”

Leonard has come a long way since he turned into a diesel mechanic as a kid on a farm. When Leonard isn’t working, he’s being a loving husband and father to his five daughters. He loves riding ATVs, and is also an active member in helping his church. To unwind, he enjoys woodworking projects.

To get in touch with Mast Service Center, call (574) 301-1274 for our Bremen shop or (574) 907-0040 for our Etna Green shop. Mast Service Center is located at 915 W Plymouth Street in Bremen, IN 46506 and at 8608 North State Road 19 in Etna Green, IN 46524. Leonard and his team of auto mechanics are ready to take care of any auto repair that you need.

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Our Valuable Team Members

Eric Troyer | Mast Service Center

Eric Troyer

Eric Troyer is ASE certified, has 9+ years of automotive experience and excels in diagnostics. Eric enjoys spending time with friends and family and playing football.

Tanya Hershberger | Mast Service Center

Tanya Borkholder
Office Assistant/Service Advisor

Tanya Borkholder The Office Assistant/Service Advisor for Etna Green. Tanya has a 2 year old daughter and resides in Nappanee. Tanya’s favorite things to do include spending time with her daughter, drawing, and being outside.



Jamison | Mast Service Center

Jamison Burkholder

Marlene | Mast Service Center

Marlene Miller
Office Assistant/Service Advisor

Landon | Mast Service Center


Matt | Mast Service Center


Ray | Mast Service Center


Wendell | Mast Service Center