Jeff Tenenbaum is one of the nation's leading nonprofit attorneys, and also is an accomplished author, lecturer, and commentator on nonprofit legal matters. Presently Senior Counsel in the Washington, DC office of the Lewis Baach Kaufmann Middlemiss PLLC law firm, Mr. Tenenbaum counsels his clients on the broad array of legal issues affecting charities, foundations, international NGOs, trade and professional associations, arts and cultural institutions, think tanks, and other nonprofit organizations, and regularly represents clients before Congress, federal and state regulatory agencies, and in connection with governmental investigations, enforcement actions, litigation, and in dealing with the media. He is frequently called upon by major media outlets – in television, radio, print, and otherwise – to provide commentary on news stories involving nonprofit legal issues and developments. Mr. Tenenbaum also has served as an expert witness in several court cases on nonprofit legal matters. For 19 years, he practiced law at Venable LLP in Washington, DC; he was a partner and chaired its nonprofit practice for most of that time, served on the firm’s Board of Directors for many years, and co-chaired the firm's management review process in 2016. Mr. Tenenbaum started his career in the nonprofit community by serving as Legal Section manager at the American Society of Association Executives, following several years working on Capitol Hill as a legislative assistant.

Mr. Tenenbaum was the 2006 recipient of the American Bar Association's Outstanding Nonprofit Lawyer of the Year Award, and was an inaugural (2004) recipient of the Washington Business Journal's Top Washington Lawyers Award. He has and continues to be one of only a handful of "Leading Lawyers" in the prestigious U.S. Legal 500 Not-for-Profit rankings for the last six years (2012-17) and is one of only three lawyers in the U.S. Legal 500 Not-for-Profit "Hall of Fame." Mr. Tenenbaum was listed in the 2012-18 editions of The Best Lawyers in America for Non-Profit/Charities Law, and was selected for inclusion in the 2014-18 editions of Washington, DC Super Lawyers in the Nonprofit Organizations category. He was the 2015 recipient of the New York Society of Association Executives' Outstanding Associate Member Award, the 2004 recipient of The Center for Association Leadership's Chairman's Award, and the 1997 recipient of the Greater Washington Society of Association Executives' Chairman's Award. Mr. Tenenbaum was recognized in 2013 as a Top Rated Lawyer in Tax Law by The American Lawyer and Corporate Counsel, and in 2011, was named as one of Washington, DC's "Legal Elite" by SmartCEO. He has been listed in the annual editions of Who's Who in American Law and Who's Who in America since 2005, was a 2008-09 Fellow of the Bar Association of the District of Columbia, and is AV® Peer-Review Rated by Martindale-Hubbell.


  • J.D., Catholic University of America, Columbus School of Law, 1996
  • B.A., Political Science, University of Pennsylvania, 1990

Bar Admissions

  • District of Columbia
  • U.S. Tax Court