Sheri A. Dillon

Sheri A. Dillon focuses her practice on federal tax controversy matters, guiding clients through Internal Revenue Service (IRS) examinations and appeals, the administrative claims process, and litigation. She counsels clients on a range of business and tax-planning matters, with a particular focus on high-net-worth individuals, partnership transactions, and closely held businesses.

Sheri has significant tax litigation experience and has appeared before the U.S. Tax Court, district and appellate courts, and the Court of Federal Claims (COFC). She represents corporate taxpayers, Tax Equity and Fiscal Responsibility Act (TEFRA) and Bipartisan Budget Act partnerships, partners, tax-exempt organizations, and global high-wealth taxpayers across a wide range of industries, including financial services, private equity, hedge fund, real estate, energy, manufacturing, and consumer products.

Sheri's recent work includes matters involving economic substance, substance-over-form, and bona fide partnership issues; the taxation of partnerships and partners; financial products; income tax accounting; cancellation of indebtedness income; employment tax; debt-equity classification; charitable contribution deductions; tax-exempt organizations; tax credits; and valuation. She also represents taxpayers and investors in promoter audit investigations.

Effective August 2026, Sheri will be Chair-Elect of the American Bar Association (ABA) Section of Taxation. She is also Director and President of the Washington, DC Center for Public Interest Tax Law, which provides pro bono tax services for low-income taxpayers. 

Prior to joining the firm, Sheri was a partner with a global law firm.