Our Partners

The breadth of abilities that the partners bring to our clients is enhanced with a staff of skilled professionals. We combine the knowledge and experience of an international CPA firm with the flexibility to respond quickly to client needs.


We have structured the firm to enable our partners to invest their talents, time and energy in direct client service.


The personal accessibility of every partner at Pasquesi Sheppard LLC is a significant business asset for the companies we serve.

L. Robert Pasquesi
Professional Experience - Bob began his career as an auditor in the small business division of an international accounting firm. Bob[...]
Donald C. Sheppard
Professional Experience - Early in high school, Don decided to be an accountant. After graduating from college with a major in[...]
Timothy B. Klein
Professional Experience - Tim joined the firm in 1981 and became a partner in 1986. He provides a broad range of[...]
Dennis P. O’Brien
Professional Experience - Dennis joined Pasquesi Sheppard LLC in 1984 and became a partner in 1987. Prior to joining the firm,[...]
Mark Zivkovic
Professional Experience - Mark Zivkovic specializes in individual and corporate tax planning, mergers and acquisitions and estate planning for privately-held companies[...]
David A. Schafer
Professional Experience - David has been a member of the firm since 1992. He provides a wide array of tax, accounting,[...]
Patrick Gras
Professional Experience - Patrick joined Pasquesi Sheppard LLC in 2001. Prior to joining the firm, he worked for a large, Chicago[...]
Michelle Prosecky
Professional Experience - Michelle joined our firm in 2000. During this time, she has performed attestation work for closely-held businesses, including[...]
David P. Witt
Professional Experience - David has been a member of the firm since 2000. He performs assurance and tax preparation work for[...]