Ketel Thorstenson

Ketel Thorstenson, LLP (KTLLP) has been operating as an accounting practice in Rapid City since 1936, when Harold Heims first opened the practice and hired A.C. (Bud) Thorstenson. 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. 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 130 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. Mission:?Provide the finest professional services, including auditing, attestation, accounting, tax and consulting services. Be associated with the region?s fastest growing companies and to help each client attain their maximum potential. Be a firm that is an enjoyable and rewarding place to work and do business. Contribute to our community and the profession to which we belong. Grow, but never lose the local identity and personal relationship with clients that are the foundation of our practice.