Lon Musslewhite

Williams & Connolly LLP

Lon Musslewhite's practice encompasses a broad range of tax law issues with an emphasis on exempt organizations, general income tax matters, and trusts and estates. Mr. Musslewhite has previously worked in public accounting as a CPA and in the IRS as a Revenue Agent. As a tax attorney, he has formed private foundations, public charities and social welfare funds, helped them obtain tax-exempt status and worked with them to resolve difficult issues related to 990’s, state reporting, ruling requests and tax audits and investigations. Mr. Musslewhite is a member of the ABA Tax Section's Exempt Organizations Committee and its Estate and Gift Taxes Committee, the ABA's Real Property, Probate and Trust Law Committee, the National Capital Gift Planning Council and the District of Columbia Estate Planning Council. Mr. Musslewhite has been elected by his peers for inclusion in The Best Lawyers of America in the areas of Tax Law and Litigation – Trusts & Estates for 2014-15.


  • A Federal Court Limits Treasury’s Investigative Powers, Taxation of Exempts, March/April 2010
  • How OFAC Shut Down a Charitable Organization, Taxation of Exempts, September/October 2009
  • Treasury Simplifies Initial Ruling Procedures for Public Charities, A Special Report from the Non-Profit Legal and Tax Letter, April 27, 2009