Jerry & Mary Ellen Heirigs

Jerry has always dreamed of owning his own repair shop since he graduated from Mitchell Vo-Tec. He spent several years working at a transmission shop and a dealership preparing him for the opening of J & M Transmission in August 1993. Jerry started J & M as the owner, builder and janitor. As the business grew and the automotive industry changed, J & M service expanded to include general repair and added several staff members. Today we have 6 employees and an 8400sq. foot air-conditioned shop. “We are a full service repair shop that fixes the whole vehicle not just the transmission.

We are committed to customer’s service! With that being said, not only do we shuttle customers but we also offer at no additional cost, free vehicle pick-up. So in other words, J & M will pick up your vehicle while you’re working, service it, and then return it back to your work or home all without you leaving your office chair.

After 20 years of nursing, Mary Ellen decided it was time to join the family business. In spring 2004, she started working with our customers and taking care of the marketing and advertising. When asked if she misses nursing she says “No! When customers call and the vehicle are broken down it’s a big problem. So whether it’s a phone call with a sore toe or a broken down vehicle, we need to help fix the problem.”

Jerry and Mary Ellen have been married for 33 years May 18 and have 2 boys. Joshua is married to Rachel and now works as a Director of Christian Education in Rochester, MN. Our youngest son, Jeremy has graduated High School and is starting at Southeast Tech this fall for Collision Repair. He is .starting his first restoration project-a 1966 Ford LTD 2 door hard top, the car will be powered by a Ford 460 V8 and have a C6 transmission.

J&M Transmission Marketing

Todd Bradwisch’s

Todd Bradwisch is a wonderful member of our staff here at J&M Transmission & Auto Service. Todd spent ten years working with the South Dakota Special Olympics and has the biggest heart. Todd also served his country in the Army National Guard for 9 years. He truly has passion and drive for serving others! Todd has been married for 20 years and has two fantastic children, Tristian, age 17, and Kylie, age 13. Todd enjoys hunting, fishing, golfing, and spending time with his family. Todd has an amazing way with people and we are blessed to have him as a part of the J&M Family!

Service Advisor

Justin Ymker

Justin joined J & M Transmission in 2015 with over 12 years’ experience in automotive parts industry and 6 years in management. At J & M, Justin is now a Service Advisor helping out in the front office. Justin lives in Sioux Falls with his wife Kristel and enjoys woodworking and fishing. Justin and Kristel are now parents to a baby boy, Finn. Bella now has a little brother to look after!

ASE Certified Master Technician with L1

Scott Nielsen

Scott comes to J & M transmission with 28 years of GM, Honda, and Ford dealership experience of which the last 15 years he was the service manager in South Texas. Scott is an ASE Certified Master technician and is originally from rural Viborg area. Scott moved back to South Dakota in spring 2011 with his wife, Helen and son Thomas. Their other son Christian and daughter Aubrey live in Texas. Scott enjoys hunting and fishing with his son.

Isaac Schorer

Isaac graduated with honors from Southeast Technical College. He and Katy are both originally from Fulda, Minnesota. Isaac moved to Sioux Falls to pursue his degree to become an Automotive Technician and Katy moved to Sioux Falls i to pursue a bachelors degree in nursing at the University of South Dakota and is on track to graduate in December of 2020.

This January, Isaac and Katy welcomed their sweet little boy, Hudson. He is a very happy content little boy and we all love him! Isaac and Katy are getting married soon, though the date is not yet set.

“I really enjoy working at J & M Transmission and Auto Service! Katy, Hudson and I would like to stay in the area after Katy graduates nursing school so that I can continue working here. Jerry and Mary Ellen have treated us both very well – we feel as though we are part of their family!”- Isaac

In his spare time, Isaac likes to hunt, fish, and go to tractor pulls with his family.


Jaden and his girlfriend Sarah of 6 years lives in Sioux Falls with their little guy, Dax. Jaden is a graduate of Southeast Technical College and has a degree in Automotive. Sarah graduated from Southeast Technical College with a degree in office management.

In his spare time, Jaden enjoys tinkering on his 87 Monte Carlo and hanging out with his sweet little family.


Kiron is an ASE Certified technician and.has been a technician since 1997. He is highly skilled in electrical diagnostic, among many other things. He loves the challenge that diagnosing broken vehicles presents and he is always searching for the “why” behind what’s going on with a car. He and his wife, Michele, live in Elk Point, SD and have 2 cats. They enjoy traveling to the Black Hills in their free time, and Kiron also enjoys woodworking.

Isaac Norton

Hunter Thomas

Customer Greeter


I am a Boston Terrier and Beagle mix and I am the official customer greeter! I love to chase leaves and bunnies when I am outside. When you come to J & M, you can play tug of war with me…..please!