Partner, New York Phone +1-212-558-4000 Fax +1-212-558-3588 Add to Address Book

Diana L. Wollman joined Sullivan & Cromwell in 1993 and was elected partner of the Firm in 1999. Ms. Wollman’s practice focuses on U.S. federal tax matters and New York State corporate and bank tax matters, and includes assisting clients with audits, controversies, requests for private rulings and other interactions with tax authorities, compliance, ethics and professionalism, and complex international tax issues. She is a frequent speaker on a variety of topics, including planning for and handling tax controversies, understatement penalties, and ethics and professionalism. Recent engagements include two Practising Law Institute presentations she devised called, “Oh Man, I Wish I’d Known That! – What Transactional Tax Lawyers Need to Know About IRS Audits” and “My Tax Lawyers’ Fingerprints Are On My Deal – Is That a Problem?” and moderating a panel at the University of Chicago Federal Tax Conference on the implications of the growing trend toward Economic Nexus and whether it is an appropriate standard for international taxation. Ms. Wollman has published papers on a variety of issues, ranging from financial products and derivatives to the U.S. earnings stripping rules and U.S. treaty obligations. She is an active member of the NYSBA Tax Section, currently serving as the co-chair of the Committee on Compliance, Practice & Procedure, and has worked on numerous reports on a range of subjects. Ms. Wollman was previously an adjunct professor at Columbia Law School, teaching “Ethical Issues in Tax Practice” and “International Taxation.”

Rankings and Recognitions

• Fellow, American College of Tax Counsel
• Chambers Global: The World's Leading Lawyers for Business (2003, 2004-2005)
• Chambers USA: America’s Leading Lawyers for Business (2003-2004, 2004, 2005, 2006, 2007, 2008, 2009)
• New York Super Lawyers (2006, 2007, 2008, 2009)
• The Legal 500, U.S., Volume IV (2007, 2009)
• The Best Lawyers in America (2006, 2007, 2008, 2009, 2010)
• The International Who's Who of Corporate Tax Lawyers (2009)