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

  • Stefan Oehlberg
    New Vehicle Sales Manager


    Stefan joined the Mills team in 2020, bringing 6 years of prior automotive sales and management experience earned working in New York and Florida dealerships.  He grew up in Rockland County, New York and attended SUNY Rockland before taking a Sales Manager position at a dealership in Orangeburg, NY.  A move to Florida for 17 years led Stefan to working a slightly different vocation for a period of time, purchasing Structured Settlements and Annuities, before eventually coming back to work in the automotive field as a Brand Specialist for a dealership in Stuart, Florida.  Now living in Benson, Stefan continues to apply his skills and friendly personality assisting people with their automotive needs.  Stefan and wife Colleen have three children: Connor, Cole and Cora; 2 German Shepherds: Gunnar and Bella, a cat named Tiger and a boa constrictor named Fluffy.  When he's not working Stefan enjoys practicing Goju Ryu Karate, spending time with his family, and his family also enjoys volunteering at Feed My Hungry Children, a non-profit organization working toward a goal of ending childhood hunger worldwide.

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  • 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.

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  • Jacky Diaz
    Sales and Leasing Consultant


    Jacky joined the Mills team in 2020, a fresh face to the automotive field but no stranger to customer service having worked mostly retail positions in her past.  Prior to coming to Mills she served as an assistant manager at a fashion accessories store in the Kandi Mall.  A friendly and familiar face to many in the area, and very home-town proud, Jackie was born and raised in Willmar and still calls it home. When she's not working Jacky enjoys spending time with her mini pinscher named Kai, sight-seeing, travelling and finding new things to do.

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  • Ross Metz
    Sales and Leasing Consultant


    Ross started with Mills in 2021 having returned to his Minnesota roots after spending some time working at an O'Reilly Auto Parts store while living in Rosenberg, Texas.  Ross grew up in Swift Falls, just outside of Benson, Minnesota which he describes with a smile as "a very small town of about 40 people".  He attended the Benson High School and worked in retail and customer service for several years but has been working around cars his entire life, an interest he's been more focused on in the past few years.  "I'm really excited for the opportunity to better my knowledge about the automobile industry" he said about joining the Mills team.  Ross currently lives in Willmar with his 4 year old black lab "Ruby", and when he's not working he enjoys being outdoors.  "I like to hunt and fish and most importantly, I love to hang out with my family and friends" he said.

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  • Chase Jarveis
    Sales and Leasing Consultant




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  • Dan Swart
    Service Advisor


    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.

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