Grant Thornton, one of America’s largest brands for audit, assurance, tax, and advisory services, has named Bill Marx as the firm’s new market managing principal for the Washington, D.C., area. In this role, Marx will drive growth in the D.C. market while helping local professionals deliver personalized client experiences across all industries.

Marx boasts more than 25 years of professional services experience, including 13 years as a tax principal at Grant Thornton. He has spent decades working alongside finance and tax executives of multinational businesses, providing guidance on everything from tax planning to mergers and acquisitions to cash-flow optimization. From 2015 to 2020, he led Grant Thornton’s Tax Accounting and Risk Advisory practices in the firm’s Atlantic Coast region, which includes Washington, D.C. Additionally, Marx has deep familiarity with the manufacturing, financial services, asset management and life sciences industries.

“Bill has a long track record of providing valuable guidance to public and private companies, and his extensive knowledge will be an asset to our people and clients in the D.C. area,” said Jim Wittmer, Grant Thornton’s managing principal for the Atlantic Coast region. “He’s the right leader at the right time, particularly as we bring our distinctive, personalized service to publicly-traded and private-sector clients, including many of the nation’s top government contractors.”

Prior to joining Grant Thornton in 2011, Marx held leadership positions at multiple organizations, including a role as the tax director for a multinational, publicly-traded company. His tax knowledge is coveted outside the firm, too, particularly given Marx’s skills for teaching. He frequently leads classes and panels at events hosted by the Financial Executives Network, the Tax Executives Institute and the American Bar Association.

He looks forward to bringing this knowledge and experience to his new role and making an even greater impact on the firm’s clients.

“Grant Thornton has an incredible team in place in the D.C. region, and we’re providing a level of high-touch service that’s tailored for the broad range of organizations based in our nation’s capital — both inside and outside of the government,” said Marx. “I can’t wait to expand our footprint in this unique community and bolster our peoples’ collective skill set. That’s how we’ll help our clients navigate any challenges they may face.”

Marx earned bachelor’s degrees in education and accounting from Pennsylvania State University. He also holds a master’s degree in taxation from the University of Tulsa.

About Grant Thornton

“Grant Thornton” is the brand for two professional-services entities: Grant Thornton LLP, a licensed, certified public accounting (CPA) firm that provides audit and assurance services ― and Grant Thornton Advisors LLC (not a licensed CPA firm), which exclusively provides non-attest offerings, including tax and advisory services. With revenues of $2.4 billion for the fiscal year that ended July 31, 2023, and dozens of offices nationwide, Grant Thornton represents a community of more than 9,000 problem solvers, relationship builders, and industry specialists who know that how we serve matters as much as what we do.

Grant Thornton LLP, Grant Thornton Advisors LLC and their respective subsidiaries operate as an alternative practice structure (APS). The APS conforms with applicable laws, regulations and professional standards, including those from the American Institute of Certified Public Accountants.

Grant Thornton LLP and Grant Thornton Advisors LLC serve as the U.S. member firms of the Grant Thornton International Ltd (GTIL) network. GTIL and its member firms are not a worldwide partnership and all member firms are separate legal entities. Member firms deliver all services; GTIL does not provide services to clients.

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