Ketel Thorstenson, LLP, CPA in Rapid City, SD

The rich history of change and growth has led to three name changes and seven building remodels/additions. In addition to growing the practice, the Partners of KTLLP continue to be visionaries and delve into business solutions for their clients outside of traditional accounting services.
Today the KTLLP family employs over 160 professional staff members, including 18 partners, and operates out of Rapid City, Spearfish, and Custer, SD. We are proud of our longevity and thankful for all of the clients who we consider as friends. KTLLP looks forward to many more years of continued growth serving the regional market.
Ketel Thorstenson, LLP (KTLLP) has been operating as an accounting practice in Rapid City in one form or another since 1936, when Harold Heims first opened the practice and hired A.C. (Bud) Thorstenson shortly after. The firm started in offices above the old North Western Warehouse, and then moved to space above Staple & Spice. The building at the current 810 Quincy Street address was constructed in 1966; the same year that Roy Ketel and Rich Siekman worked together to form a new partnership.
Pete Bergman, CPA
As an analytical accountant, Pete has been with the firm for over 35 years, primarily in the tax department. With this much experience under his belt and expertise in areas of partnership, corporate, and individual income taxes, he has grown to enjoy the challenges of his work. Pete is knowledgeable in both researching tax issues and solving complex tax problems.
Pete graduated with a bachelor of science in accounting from the University of North Dakota. He has a passion for playing foosball and enjoys hiking in the Black Hills as the hikes usually end up at a good restaurant.
Thank you for providing another great learning opportunity. I’m glad I came. I’m down in the weeds and it’s good to step back and get the big picture.
Carolyn Ness
Associate Director
Northern Plains Eye Foundation
810 Quincy Street
Rapid City, SD 57701
Phone: (605) 342-5630
FAX: (605) 342-2172