Mon - Thurs 8AM - 5PM , Fri 8AM - 2PMCall Us605-342-5630Our Address810 Quincy Street Rapid City, SD 57701
1936

Harold Heim moves from New York and starts an accounting practice in Rapid City


Harold Heim moves from New York and starts an accounting practice in Rapid City<br><br><br>
1940

S.S. Schouweiler moves to Rapid City and starts accounting practice Dale Sayler starts working for Heim

S.S. Schouweiler moves to Rapid City and starts accounting practice Dale Sayler starts working for Heim<br><br>
1950

A.C. (Bud) Thorstenson starts working for Heim S.S. Schouweiler buys the Heim Practice. Thorstenson and Sayler work for him

A.C. (Bud) Thorstenson starts working for Heim S.S. Schouweiler buys the Heim Practice. Thorstenson and Sayler work for him
1958

The Firm of Schouweiler, Sayler & Thorstenson is formed



The Firm of Schouweiler, Sayler & Thorstenson is formed<br><br><br><br>
1966

Sayler, Thorstenson, Jerry Benson, Roy Ketel and Rich Siekman form a new partnership called Sayler, Thorstenson & Co

Sayler, Thorstenson, Jerry Benson, Roy Ketel and Rich Siekman form a new partnership called Sayler, Thorstenson & Co
1967

IBM System 1130 computer installed


IBM System 1130 computer installed<br><br><br>
1968

Addition constructed to house computer room and additional offices

Addition constructed to house computer room and additional offices<br><br>
1974

Acquire property adjoining 810 Quincy in Rapid City


Acquire property adjoining 810 Quincy in Rapid City<br><br><br>
1977

Addition to 810 Quincy constructed




Addition to 810 Quincy constructed<br><br><br><br><br>
1980

John Walker and Dennis Nelles admitted as partners Office opened in Spearfish



John Walker and Dennis Nelles admitted as partners Office opened in Spearfish<br><br><br><br>
1981

Dale Sayler withdraws from partnership. Roy Ketel becomes the first Managing Partner Firm becomes a subscriber of Grant Thornton Accounting & Auditing Materials

Dale Sayler withdraws from partnership. Roy Ketel becomes the first Managing Partner Firm becomes a subscriber of Grant Thornton Accounting & Auditing Materials
1982

First PC Computer put in service. Pete Bergman and Mike Finnegan admitted as partners



First PC Computer put in service. Pete Bergman and Mike Finnegan admitted as partners<br><br><br><br>
1985

Firm has first peer review by AICPA team


Firm has first peer review by AICPA team<br><br><br>
1987

Dan Corey practice purchased and employed. Black Monday stock market crash. AICPA celebrates its 100th Anniversary

Dan Corey practice purchased and employed. Black Monday stock market crash. AICPA celebrates its 100th Anniversary
1989

Firm changes name to Ketel Thorstenson, LLP. Merger with Vigoren and Stokes in Spearfish. Rex Vigoren becomes partner

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

Paul Thorstenson, Kay Walker and Donna Denker admitted as partners<br><br>
1991

Addition to 810 Quincy constructed



Addition to 810 Quincy constructed<br><br><br><br>
1994

First tax return is e-filed




First tax return is e-filed<br><br><br><br><br>
1995

Addition to 810 Quincy completed. Business Valuation department established. Building and parking at 823 Quincy purchased

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


Tax practice of J&J Bookkeeping in Custer purchased. All personnel employed<br><br><br>
1997

Dave Hoyer joins Firm. Practice of Herb Kaden acquired





Dave Hoyer joins Firm. Practice of Herb Kaden acquired<br><br><br><br><br><br>
1998

John Walker becomes new Managing Partner. Steve Schacht and Brent Siekman admitted as partners. KT Connections, Inc., a computer and telecommunications firm organized

John Walker becomes new Managing Partner. Steve Schacht and Brent Siekman admitted as partners. KT Connections, Inc., a computer and telecommunications firm organized
2000

Building at 829 Quincy purchased and remodeled for KT Connections Inc.




Building at 829 Quincy purchased and remodeled for KT Connections Inc.<br><br><br><br><br>
2002

Denise Webster and Merle Karen admitted as partners





Denise Webster and Merle Karen admitted as partners<br><br><br><br><br><br>
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

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







Joel DeVries admitted as partner<br><br><br><br><br><br><br><br>
2008

New building addition officially opens for business






New building addition officially opens for business<br><br><br><br><br><br><br>
2011

Nina Braun, Doug Kenoyer and Jennifer Konvalin admitted as partners





Nina Braun, Doug Kenoyer and Jennifer Konvalin admitted as partners<br><br><br><br><br><br>
2012

KTLLP Executive Committee organized to manage the firm. Denise Webster was appointed as COO, John Walker as CFO and Paul Thorstenson as CEO

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


Kevin Sickels admitted as partner. Merger with Rustad Furseth in Williston, ND<br><br><br>
2014

Jeff Maine practice purchased and employed



Jeff Maine practice purchased and employed<br><br><br><br>
2015

Fred Krush retires from Ketel Thorstenson, LLP. Traci Hanson admitted as partner


Fred Krush retires from Ketel Thorstenson, LLP. Traci Hanson admitted as partner<br><br><br>
2016

Ketel Thorstenson, LLP celebrates 80 years in business



Ketel Thorstenson, LLP celebrates 80 years in business<br><br><br><br>
2017

Pete Bergman retires from KTLLP. Michelle Minnerath admitted as partner


Pete Bergman retires from KTLLP. Michelle Minnerath admitted as partner<br><br><br>
2018

Steve Schacht named CFO. John Walker retires from KTLLP. Merger with Todd Hoese, CPA, LLC in Gillette, WY. Todd Hoese is admitted as partner

Steve Schacht named CFO. John Walker retires from KTLLP. Merger with Todd Hoese, CPA, LLC in Gillette, WY. Todd Hoese is admitted as partner
2019

Jess Weaver is admitted as partner



Jess Weaver is admitted as partner<br><br><br><br>
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