About Us

Our Firm

Choosing the right CPA firm is critical to the success of any business. Along with accounting services, a CPA must understand your business and your financial needs and goals. At Mahle, Wack, Zaidain & Co., PLL, Certified Public Accountants, we strive to provide the highest quality of accounting services and financial advice to our clients. Our professional staff is experienced in a wide variety of industries, and dedicated to understanding the unique aspects of each client. We will spend time with you, asking questions and offering suggestions to help you improve your bottom line.

Staff Profiles

Joseph S. Zaidain, CPA/ABV/CFF, PFS, CVA (Partner)

Joe is a graduate of the University of Dayton with a Bachelors and Masters degree. He has over thirty years of experience in accounting. Joe’s specialties include personal and estate tax preparation and planning, business valuations, and general management consulting. Joe is a member of The American Institute of Certified Public Accountants (AICPA), The Ohio Society of Certified Public Accountants, and is accredited by the AICPA in Business Valuations (ABV), Forensics (CFF), and Personal Financial Planning (PFS). Joe also serves several church, school, and athletic organizations.

David K. Holzapfel, CPA (Partner)

David has been in public accounting for over twenty years. He is a graduate of Wright State University. David has a broad range of experience involving work with construction firms, manufacturers, wholesalers, retailers, non-profit organizations and service industry clients. He is a member of The American Institute of Certified Public Accountants and The Ohio Society of Certified Public Accountants. He has served on the executive board of a youth soccer organization and on the board of a local Little League organization.

Kelly R. Sauer, CPA (Partner)

Kelly joined Mahle, Wack, Zaidain & Co., PLL in September of 2005. She performs work in the areas of tax, accounting, payroll and auditing for a variety of industries including non-profits, retirement plans, restaurants, retail, and wholesale/distributors. She is a member of The American Institute of Certified Public Accountants and The Ohio Society of Certified Public Accountants. Kelly is a graduate of Wright State University and a veteran of Operation Iraqi Freedom.

Carol R. Imundo, CPA

Carol is a graduate of Wright State University. She passed the CPA Exam in November, 2001 and has been in public accounting since 1999. Carol joined the firm in September, 2005. Her professional background includes tax preparation, accounting and auditing, specializing in construction firms, manufacturers, wholesalers, retailers, real estate, service industries and retirement benefit audits. Carol is a member of The Ohio Society of Certified Public Accountants.

Kimberly J. Powell

Kim joined the firm in February, 2000. She has acquired over thirty years banking and finance experience with an emphasis in personal finance. Kim determines the need for financial products and services for existing and potential clients. She is licensed by the State of Ohio Department of Insurance. She is a graduate of Sinclair Community College and Capital University.

Tony Wirtz

Tony joined Mahle, Wack, Zaidain & Co., PLL in January 2015 and is currently a senior at Wright State University. His responsibilities mainly include tax preparation, accounting, and payroll. Tony has also recently worked in guest services for the Walt Disney Company in Orlando, Florida.