Our Team


Click on one of the people below to find out more information.

Mark Hieb
General Manager

With an automotive career in sales, finance and customer service that started in 2001, Mark joined Mills in July 2015. He was previously with dealerships in St. Cloud and Monticello. Mark is originally from Medina, ND., a graduate of Medina High School, was a student in  computer and business programs at Union College, Lincoln, Neb., and holds Google Analytics Certification. In addition to his automotive background, Mark was with Fargo-based Tharaldson Enterprises as manager of operations for 13 hotels. He and his wife, Patricia, have three children and live in St. Cloud. Outside of his work at Mills, Mark enjoys riding motorcycles, four-wheelers and snowmobiles, along with golf and basketball.

961ea5f6b69e425895b2e058e1db2d1f
Sandra Smith
Sales Manager

Sandra joined Mills in December 2014 as an administrative manager at Mills Auto Center and Mills Ford Chrysler. She was promoted to her current position in November 2016. Sandra was previously store manager at Herberger's in Willmar, where she spent 22 years in many different roles. She is a graduate of Culbertson High School in Montana, and the University of Mary, Bismarck, ND, with a degree in business administration.  Outside of work, Sandra enjoys CrossFit work outs, running, reading, time and with friends and family, especially her childrens' events.

f3d5e444e0b14ec1bb31861e264d4cc8
Wes David
Used Vehicle Manager

Wes joined Mills in 2016 after working seven years as a sales consultant for dealerships in St. Cloud and the Twin Cities. He was also a manager/trainer for Holiday Station Stores, a business owner, and a graduate of St. Michael-Albertville High School. Wes and his wife, Jennifer, have five children together and the family lives in Freeport. He is a member of the Freeport Fire & Rescue. When time allows, Wes loves to fish.

bf7d1af8c8be4dedbfea82247ec6728c
Ken Plombon
Sales Manager


bb73a37eb2f4426f8a9f8dd05ef10230
Roberta Sharpe
Finance Manager

After initially joining Mills in 2015 as a part time receptionist/cashier, Roberta moved to sales in 2016. She was previously a blackjack dealer/pit boss and worked in the beverage department at Jackpot Junction Hotel and Casino. Roberta also owned a beauty/hair salon for six years. She is originally from Wisconsin, but her family moved to Renville when she was 10. Roberta is a 1980 graduate of Renville High School and a 1998 graduate of Ridgewater College with a degree in cosmetology. She lives in Willmar. Roberta has two daughters, Emma and Taylor. Outside of work, Roberta is active in community theatre, teaching Sunday School teaching and singing in the church choir. She enjoys golf, cards, music, billiards, cooking, and time with family and friends.

315dcdcaaf0a4f8d92aae1394df32ac1
Dan Swart
Service Manager

Dan joined Mills Auto Center in October of 1988. Dan and his wife Linda have 4 children; Connor, Ava, Audrey and Charles. In his free time he enjoys golfing and spending time with his family and friends.

6d49a1b499074dd18f3967533f1893e4
Robert Ruter
Sales and Leasing Consultant

Robert has been in the automotive business since 1994. He has worked for Mills since the company originally acquired the dealership in Willmar. He has been married since 1993 and has two boys. Robert enjoys many outdoor activities, primarily snowmobiling and fishing.

c700267605854cb69ccf406280ba6643
Rick Hess
Sales and Leasing Consultant

A veteran of 20-plus years in the car business, Rick returns to Mills after working more than two years as used car manager at the former Swenson Motor Co., Willmar. And, he's never really left home, having been born/raised in Willmar, and graduating from Willmar High School. Rick is also a graduate of Hamline University with a degree in economics. His automotive career started at Manley Auto Center, Willmar, which later became Mills Auto Center. Rick and his wife, Linda, have one son and six grandchildren. He plays golf and enjoys watching his son drive in drag races.

f75dd6cec7434830bc7cb69295a365e3
Andrew Trongaard
Service Advisor

Andrew joined Mills in 2016 after working four years as a service advisor at Tires Plus. He was also a delivery driver for Jake's Pizza, and previously worked at Foot Locker. Andrew was born and raised in Willmar, and he is a graduate of Willmar High School. His wife, Corteney, is a service advisor at Mills Ford Chrysler. Andrew enjoys attending car shows and working on classic cars.

f6879f2cc0434f6895c87992ee575c38