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Walt is a CPA with 8 years of public accounting experience; plus private industry employment and governmental auditing experiences.  His specialties include accounting  and tax compliance and preparation services for individuals and businesses in the private sector.

Walt was born in Rugby and grew up on a farm near there.  After graduating from the University of Mary with majors in both Accounting and Business Administration, he took a position as a corporate income tax auditor with the ND Tax Commissioner.  He has held several managerial positions in both small and large corporations in the private sector; one of which was Vice President–Division Controller for U.S. Home Corporation, a residential developer traded on the New York Stock Exchange.  

Walt’s homebuilding position included moves from San Diego to Dallas, Las Vegas and Denver.  He and MaryBeth moved back to Bismarck for a CPA position with Capital Accounting in 2010.  Walt previously volunteered for finance committee, Treasurer, and prison educator for nonprofits primarily during his 14 years in Denver.  He enjoys horticulture and fishing, especially the fall salmon runs at Lake Sakakawea.   


  • Bachelor of Science, Accounting & Business Administration - University of Mary, Bismarck, ND

Designations and licensure

  • Certified Public Accountant - North Dakota

professional memberships

  • North Dakota Society of Certified Public Accountants

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Stephanie Thorp joined Haga Kommer in 2016 and has over 18 years of experience in public accounting. She has experience with individual, corporate and partnership taxes, as well as, bookkeeping, payroll and accounting.

Stephanie is a board member of her township and local Dollars for Scholars chapter.

She enjoys gardening, reading, traveling and spending time with family and friends.


  • Bachelor of Science, Accounting - University of Mary


  • Certified Public Accountant, North Dakota
  • Notary Public



Jessica joined Haga Kommer in 2017 as an accountant. She previously worked for Wisian and Breeding, PLLC in Amarillo, TX as an accountant where she gained experience in bookkeeping, payroll and tax preparation.

She enjoys spending her spare time riding and training horses and competing in rodeos throughout the summer. 


  • MPA/BA in Accounting - West Texas A&M University - Canyon, TX
  • Associate in Agricultural Business/Accounting - Northwest College - Powell, WY

Kelda Rerick, CPA


Kelda joined Haga Kommer, CPAs in 2017. She has 10 years of tax preparation experience. Her main focus is ag taxation and tax planning. She has experience with individual, corporate, and partnership taxes as well as bookkeeping and payroll. She grew up on a farm near Napoleon. She has a husband, Jeff, and three children. She previously worked for AgCountry Farm Credit Services as a Senior Tax Specialist.


  • Bachelor of Science in both Business Administration and Office Management with concentrations in Finance and Accounting from Valley City State University.

Designations and licensures

  • Certified Public Accountant - North Dakota
  • Member of the North Dakota Society of Certified Public Accountants

Scott Hoffman


Scott joined Haga Kommer in 2017 as a staff accountant and has previous experience with both public and private accounting through past work experiences. He worked at an accounting firm in Mobridge, SD and also was in the accounting department for Harms Oil Company while attending school.

He enjoys spending time outside playing basketball, golf, tennis, and frisbee golf. He also loves spending time with family and friends.


  • Bachelor of Science in Professional Accountancy - Northern State University, Aberdeen, SD.

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Carmen joined HagaKommer in 2016 as an Administrative Assistant. She is a Mandan native who previously worked for 18 years at a dental office. Prior to that she taught part-time for a Christian School, and also part-time as a Montessori preschool and daycare aide.

In her free time, she likes to spend time with her family and friends, going to movies, walking, and doing suduko puzzles.


  • Bachelor of Science, Elementary Education with a Mathematics Minor - Dickinson State University


  • North Dakota Elementary Teaching License

Rochester Mugumbate


Rochester joined Haga Kommer in 2020. He has several years of Accounting and Auditing experience which includes private industry and state government. In his spare time, he enjoys playing golf, video games, and board games.


  • Bachelor of Business Administration and Management, Accounting - Mayville State University, Mayville
  • Master of Business Administration, Project Management - University of Mary, Bismarck

Shannon Lang


I was born and raised in Hazelton, North Dakota, and have lived my entire life in North Dakota. I currently live with my husband, Chad, our five children (Andrew, 23; Levi, 20; Corrisa, 16; Milton, 8; and Rielee, 6), and seven (yes, seven) dogs on our 5-generation family farm southeast of Bismarck about 80 miles, near Napoleon. In my free time, I enjoy reading, gardening, cooking, baking, crocheting, and quilting.

I started with Flynn & Associates, PC in the fall of 2020 as a receptionist/accountant assistant. I then became a part of Haga Kommer when Flynn & Associates was purchased by Haga Kommer February 2021. I have about 10 years of bookkeeping experience from a few small businesses near my home.


  • Associates in Applied Science - Hospitality Management from Bismarck State College
  • Associates in Arts - Accounting from Bismarck State College
  • Bachelor of Science in Accounting - Dickinson State University

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