William Eisig

William Eisig

Assurance Managing Partner


BDO McLean Office



Executive Summary

Bill Eisig is managing partner of BDO USA’s Atlantic Region. He oversees 1,100 people across ten BDO offices from Philadelphia through the Carolinas. He is responsible for all aspects of office operations including managing audit, tax, regional strategy, recruiting, human resources, business development, finance, and information technology. Bill has more than 25 years of experience in public accounting and is the engagement partner for select large and prestigious nonprofit organizations.

In addition to overseeing the Atlantic Region, Bill serves BDO USA as the Audit Department representative for the Firm’s Information Technology Advisory Council. From 2009 through 2016 he was BDO USA’s designated Audit Quality Partner for the American Institute of Certified Public Accountants (AICPA) Government Audit Quality Center. Bill is well-known for his knowledge and experience with federal funding issues, foundations, associations, public charities, joint-costs and allocation of expenses, financial reporting and numerous other issues impacting nonprofits and was a part of the AICPA Committee who wrote the AICPA’s guidance on auditing entities that receive federal funding (sampling and compliance findings).

Bill is the founding member and leader of the BDO Institute for Nonprofit Excellence. He has co-authored two ASAE publications called “Association Audits from A-Z” and “How to Read Nonprofit Financial Statements” and has lectured and spoken to a variety of audiences and Boards of Directors on issues that impact the nonprofit community.

Professional Affiliations

American Society of Association Executives
American Institute of Certified Public Accountants
Greater Washington Board of Trade, Board of Directors
Greater Washington Society of CPAs, Board of Directors (2009-2013)
Maryland Association of Certified Public Accountants
Montgomery County Chamber of Commerce, Board President (2009–2010)
University of Maryland Robert Smith School of Business, Advisory Board Member


B.S., Accounting, University of Maryland

Community Involvement

Leukemia and Lymphoma Society "Light the Night Walk", Executive Committee Member
SmartCEO Magazine 2009 CPA Innovator of the Year
Co-author of the ASAE publication "Association Audits from A to Z"