8608 North State Road 19, Etna Green, IN 46524

About Mast Service Center

group photo of Mast Service Center

Mast Service Center began with in Etna Green in 2005 with two auto mechanics at the helm. Now, with a team of ASE-Certified auto mechanics and diesel mechanics on board, we have become a trusted source for auto repair and fleet service in the region, whether you own a conventional passenger vehicles or a decked-out RV. We are not going to rest on our laurels anytime soon. We’re always seeking out new training and cutting-edge equipment so that Mast Service Center’s growing team of technicians can provide the finest and most complete auto repair services in Etna Green and the surrounding communities.

Our Philosophy

The philosophy of Mast Service Center is simple: “it’s about trust.” Our auto and diesel mechanics are serious about a transparent process that allows you to make informed decisions about auto repair and fleet services, whether you need an oil change or an alignment for your big rig. Once you’ve worked with us, we’re confident that you’ll be recommending Mast Service Center to others.

At Mast Service Center, we do our best to ensure your experience with us is convenient and stress-free. Our waiting room has wifi, couches, and snacks, so that you can feel at home and be productive while our technicians are working. We also provide free loaner cars, and if you can’t make it to our Etna Green shop, we’ll even pick up passenger vehicles from your house and return them when we’ve finished service. If you’ve got a big rig or RV that’s broken down, we’ve got a mobile service unit that will send a qualified diesel mechanic to get you back on the road.

We’re proud of how Mast Service Center has grown, and we are excited for what the future holds. Our auto mechanics steadily built up many trusting customers, and we look forward to adding you to the list once you’ve paid our Etna Green shop a visit. Just listen to the words of many of our satisfied auto repair and fleet service clients in our reviews page, like this one from Larry:

“Service was fast and accurate. Price was as quoted. No problem recommending them to my friends.”

If you’ve got a need for auto repair, don’t delay any longer. Give Mast Service Center a call. Our auto mechanics are ready for you, and our mobile service unit is willing to send a diesel mechanic to your big rig. Schedule an appointment today for both auto repair and fleet service. Mast Service Center is located at 8608 North State Road 19 in Etna Green, IN 46524. For honest, complete, and quick auto repair, Mast Service Center won’t let you down.

The Mast Service Center Team:

Leonard Mast


Leonard Mast is the proud owner of Mast Service Center in Etna Green; while he was still in middle school, he anointed himself a diesel mechanic and started working on the diesel engines on the family farm. After many years and much more auto repair education, his first auto mechanic job was performing fleet service for diesels 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 we have steadily expanded our team for auto repair and fleet services. With our mobile services unit, we can 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 team of excellent auto and diesel mechanics. Between them, no auto repair or fleet service task’s too difficult for Mast Service Center. 


HD Technician

Ray (aka “Butch”) has been working at MSC since November 2014! He works as an HD technician. In his free time, Ray enjoys woodworking, truck shows, and gardening. MSC appreciates Ray’s willingness to keep working on difficult jobs even when most would give up! Ray’s years of trucking experience have been a blessing to MSC. Ray has training in airbrakes and heavy-duty alignments.



Wendell has been working as a technician at MSC since January 2014! Wendell enjoys woodworking, restoration work, and watching football on Sunday afternoons with his wife (go Colts!). MSC appreciates Wendell’s ability to tackle almost any type of work, from major engine repairs to drivelines and alignments! Wendell has a knack for anything that needs fabrication. He is trained in heavy-duty alignments and Spartan Motor Chassis.



Micah has been working at MCS since July 2019! Micah mostly does repair jobs and engine service. Sometimes he also does diagnostics. In his free time, he likes to hunt and hang out with friends. MSC appreciates Micah’s ability to work alongside our more experienced technicians. Micah shows potential in becoming a great mechanic!



Eric has been working at SC since November 2010! Eric is an ASE L1 master technician. Eric enjoys taking automotive classes, watching football, learning new ways to cook and grill meat, and being a dad. When it comes to electronic troubleshooting, Eric is the guy that can get to the bottom of the issue! MSC appreciates Eric’s commitment to being the best in the diagnostic field. He has invested lots of time into training, and it shows!



Jamie has been working as a technician at MSC since November 2010! Jamie enjoys woodworking and doing outdoor things like mountain biking, fishing, and hiking in his free time. MSC appreciates Jamie’s commitment to taking care of customer vehicles in a very professional manner! Jamie is great at suspension, brakes, and anything mechanical!

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Service Advisor

Matt has been working at MCS since January 2014 as a service advisor! In his free time, he enjoys smoking/ grilling meat and riding his motorcycle with his son. MCS appreciates Matt’s years of experience and willingness to listen to customers! Matt loves working with customers and building relationships.

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Service Advisor

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Service Advisor

If you have any auto repair questions, contact us at our Etna Green shop. We proudly service many vehicles from the following cities and towns: Bremen, Nappanee, Etna Green, Bourbon, Inwood, Plymouth, La Paz, Milford, Leesburg, Warsaw, Mentone, Talma, Rochester, and Argos.

Whether we meet because you needed one of our diesel mechanics to help you on the side of the road, or you pull up to our shop, our auto mechanics are happy to help. In any case, once you’ve worked with us, we’re confident you’ll join our other satisfied clients in recommending Mast Service Center. Schedule an appointment today. Mast Service Center is located at 8608 North State Road 19 in Etna Green, IN 46524.