Dave is a co-managing partner of Sullivan. His practice involves both transactional tax planning and representing taxpayers in disputes before the Internal Revenue Service and the Massachusetts Department of Revenue.

Representative Client Work

  • Federal and state tax controversies, including income, sales and use, property and responsible person tax matters
  • Complex business transactions, including taxable and nontaxable acquisitions, corporate and partnership restructurings and forward and reverse like kind exchanges
  • General federal and state tax matters

Bar & Court Admissions

  • Massachusetts
  • U.S. District Court, District of Massachusetts
  • U.S. District Court, District of Connecticut
  • U.S. Tax Court
  • U.S. Court of Appeals for the First Circuit


  • B.A., with Honors, University of Virginia
  • M.A., University of Michigan
  • J.D., cum laude, Harvard Law School
  • LL.M., Taxation, Boston University School of Law

Community Engagement

  • Fellow, American College of Tax Counsel (2017-)
  • American Bar Association, Section of Taxation (1998-present)
  • Boston Bar Association (Education Committee, 2012-2013; Co-Chair, Tax Section, 2010-2012; Co-Chair, State & Local Tax Committee, 2006-2008)
  • Massachusetts Department of Revenue (DOR) Advisory Council (2013-2014)
  • Massachusetts Continuing Legal Education, Inc. (MCLE) (Tax Curriculum Advisory Committee, 2011-present)
  • Associated Industries of Massachusetts (AIM) (Taxation Committee, 2002-present)
  • Greater Boston Chamber of Commerce (Government Affairs Committee, 2012-present; 2011 Boston's Future Leaders Program) 
  • Independent SALT Alliance (President, 2012-present; Board Member, 2010-present)
  • Adjunct faculty member, Boston University School of Law, 2000

Awards & Honors

  • Boston Magazine 2021 Top Lawyers, Tax (2021)
  • Best Lawyers' Boston Tax Law Lawyer of the Year (2014, 2020. 2023)
  • Tax Controversy Leaders' Guide, International Tax Review (2013-2014, 2016-2023)
  • The Legal 500 U.S. (2012, 2015-2017, 2019, 2020, 2022)
  • Best Lawyers’ Boston Litigation & Controversy - Tax Lawyer of the Year (2012, 2016, 2018)
  • Best Lawyers in America® (2011-2023)
  • Chambers USA, Ranked in Tax (Massachusetts) (2010-2015)
  • Massachusetts Super Lawyers (2010-2018)
  • "Rising Star," Massachusetts Super Lawyers (2005-2008)

Seminars & Presentations



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