810 Quincy Street | Rapid City, SD 57701
(605) 342-5630
(605) 342-2172

Our History Timeline

1936
Harold Heim moves from New York and starts an accounting practice in Rapid City
1936 Rapid City
Large star stylized
1940
S.S. Schouweiler moves to Rapid City and starts accounting practice Dale Sayler starts working for Heim
1950
A.C. (Bud) Thorstenson starts working for Heim S.S. Schouweiler buys the Heims Practice. Thorstenson and Sayler work for him
1950 Bud Thorstenson
Large star stylized
1958
The Firm of Schouweiler, Sayler & Thorstenson is formed
1966
Sayler, Thorstenson, Jerry Benson, Roy Ketel and Rich Siekman form a new partnership called Sayler, Thorstenson & Co
1966 Rich Siekman
1967 IBM 1130 computer
1967
IBM System 1130 computer installed
1968
Addition constructed to house computer room and additional offices
1968 kt building
Large star stylized
1974
Acquire property adjoining 810 Quincy in Rapid City
1977
Addition to 810 Quincy constructed
Large star stylized
1980 john walker
1980
John Walker and Dennis Nelles admitted as partners Office opened in Spearfish
1981
Dale Sayler withdraws from partnership. Roy Ketel becomes the first Managing Partner Firm becomes a subscriber of Grant Thornton Accounting & Auditing Materials
1981 Roy Ketel
Large star stylized
1982
First PC Computer put in service. Pete Bergman and Mike Finnegan admitted as partners
1982
First PC Computer put in service. Pete Bergman and Mike Finnegan admitted as partners
1982 PC Computer
1985 peer review
1985
Firm has first peer review by AICPA team
1987
Dan Corey practice purchased and employed. Black Monday stock market crash. AICPA celebrates its 100th Anniversary
1987 dan corey
1989 article firm name change to KT
1989
Firm changes name to Ketel Thorstenson, LLP. Merger with Vigoren and Stokes in Spearfish. Rex Vigoren becomes partner
1990
Paul Thorstenson, Kay Walker and Donna Denker admitted as partners
1990 Paul Thorstenson
Large star stylized
1991
Addition to 810 Quincy constructed
1994
First tax return is e-filed
1994 e-file tax return
1995 KT building
1995
Addition to 810 Quincy completed. Business Valuation department established. Building and parking at 823 Quincy purchased
1996
Tax practice of J&J Bookkeeping in Custer purchased. All personnel employed
1996 custer office
1997 Dave Hoyer
1997
Dave Hoyer joins Firm. Practice of Herb Kaden acquired
1998
John Walker becomes new Managing Partner. Steve Schacht and Brent Siekman admitted as partners. KT Connections, Inc., a computer and telecommunications firm organized
1998 john and brent
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2000
Building at 829 Quincy purchased and remodeled for KT Connections Inc.
2002
Denise Webster and Merle Karen admitted as partners
2002 Denise and Merle
2005 Partners Revised
2005
Acquisition of McGladrey & Pullen/RSM McGladrey. Jean Smith, Clark Kraemer, Fred Krush and Craig Steinman admitted as partners. Dakota Backup & Recovery, a data backup and disaster recovery solution provider organized
2007
Joel DeVries admitted as partner
2007 Joel DeVries
2008 New Building opens
2008
New building addition officially opens for business
2011
Nina Braun, Doug Kenoyer and Jennifer Konvalin admitted as partners
2011 New Partners Revised
2012 Exec Committee
2012
KTLLP Executive Committee organized to manage the firm. Denise Webster was appointed as COO, John Walker as CFO and Paul Thorstenson as CEO
2013
Kevin Sickels admitted as partner. Merger with Rustad Furseth in Williston, ND
2013 Kevin Sickels
Large star stylized
2014
Jeff Maine practice purchased and employed
2015
Fred Krush retires from Ketel Thorstenson, LLP. Traci Hanson admitted as partner
2015 Traci Hanson
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