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About Us

Allinial Global

Firm Profile

Thorn Lewis + Duncan provides a full range of accounting and tax services with a level of professionalism and expertise normally associated with national or large regional accounting firms. As a local practice, however, our firm has a much greater sensitivity to the individual circumstances, personalities, and operating environment of our clients. Our competitive advantage lies in our ability to offer professionalism in a wide range of accounting, tax and advisory services while maintaining a level of personal attention that few, if any, large accounting firms can match.

Affiliations Nationally and Worldwide

Thorn Lewis + Duncan is affiliated with accounting firms nationally through Allinial Global.     Allinial Global is an association of 97 independently owned public accounting and consulting firms with offices in North America and throughout the world through international members and partnerships.  Members share educational, client services, technical and marketing resources and expertise. Membership in Allinial Global allows us to significantly broaden our firms representation and provides the technical support so critical in our ever-changing and expanding profession.

Firm History

Our firm was founded in 1985 by William T. Thorn. Bill began his career in 1971 with Deloitte Haskins & Sells nka Sells nka Deloitte. where he served as the partner in charge of the tax department of its Dayton, Ohio office.

In 1987, Darrel W. Hollenbacher joined Mr. Thorn and they purchased the Dayton office of Meaden & Moore, a regional firm based in Cleveland, Ohio. The firm name became Thorn & Hollenbacher, Inc.

Robert W. Lewis joined the firm in 1987. Bob began his career in 1978 with Deloitte Haskins & Sells nka Deloitte. where he served as a senior manager in its Dayton, Ohio office.

In 1996, William D. Duncan combined his practice with Thorn & Hollenbacher, Inc. Bill began his career in 1974 with Deloitte Haskins & Sells nka Deloitte. where he served as a manager in its Dayton, Ohio office. From 1985 to 1995 Bill was a partner in the CPA firm of Stout and Duncan, Inc.

In 1998, Mr. Hollenbacher resigned from the firm to accept a position with one of our clients. The firm name became Thorn, Lewis & Duncan, Inc. in June 1998.

In 2002, Donald J. Schrodi became a shareholder. Don joined the firm in 1990 after beginning his career in the international accounting department at NCRs World Headquarters.

In 2016, Christina L. Sensenbrenner and Benjamin J. Tuschong became shareholders.   Christina joined the firm in 1996 after beginning her public accounting career with Stout and Duncan, Inc.  Ben joined the firm in 1998 after graduating from the University of Dayton.

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Our office is located on the 20th floor of the
Kettering Tower in Dayton, Ohio

Serving the Southern Ohio region, including Dayton, Springboro, Xenia, Springfield, Troy, Middletown, Columbus and Cincinnati
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