Joseph B. Darby  III - Sullivan & Worcester LLP

Joseph B. Darby III

Listed in Best Lawyers since 2010

Joseph B. Darby III is a tax and business attorney practicing in the Boston office of Greenberg Traurig LLP, and has been admitted to Massachusetts Bar since 1979.  He concentrates his legal practice on business and transactional tax law, advises a wide variety of business entities and individuals on business- and tax-related legal matters.  He has been recognized as one of the Best Lawyers in America in the area of tax practice in the 2010 and later editions of Best Lawyers®, the oldest and most respected peer-review publication in the American legal profession. 

Mr. Darby is the author of Practical Guide to Mergers, Acquisitions and Business Sales, published by CCH (formerly Commerce Clearing House), a Wolters Kluwer business, and he is a recognized authority in the successful structuring of mergers, acquisitions, business sales, and related transactions (such as characterizing a business acquisition as a sale of personal goodwill).  He teaches a course entitled Tax Aspects of Buying and Selling a Business at the Boston University School of Law Graduate Tax Program (GTP), and a similar course at Bentley University in the Masters in Taxation Program (Bentley).

Mr. Darby is also a recognized authority on the taxation of intellectual property, including tax aspects related to the development, licensing and exploitation of intellectual property rights, the migration of valuable intellectual property to offshore jurisdictions, and the tax-efficient licensing and/or sale of intellectual property rights.  He teaches two courses on taxation of intellectual property at the GTP, the first entitled Taxation of Intellectual Property, and the second entitled Structuring Intellectual Property Transactions, and also teaches the first course at Bentley. 

Mr. Darby has been the recipient of numerous journalism and writing awards,including the award for “Tax Writer of the Year - 2007” from the World Trade Executive family of publications, now owned by Thomsen Reuters.  He has authored two books and more than 1,000 articles published in such diverse publications as The Tax Lawyer, Worth Magazine, Venture Capital Magazine, Banker & Tradesman, Mass High Tech, Hemispheres Magazine, Contract Professional, Trusts & Estates Magazine, The Boston Globe, The Boston Herald, The Boston Business Journal and The Boston Phoenix. 

Prior to practicing law, Mr. Darby was a sports writer, and wrote sports articles and columns for numerous publications including the Boston Herald, Boston Phoenix, Hemispheres Magazine and Worcester Magazine.  He was honored with the First Place award in the category of Sports Columns by the New England Press Association in 1990.

Mr. Darby is in the process of launching an "e-newsletter" entitled “Tax and Sports Update,” which is intended to be a fun and readable weekly tax alert that will be billed, tongue in cheek, as “the ONLY tax newsletter with an award-winning sports column.”  Contact Mr. Darby at or at if you would like to receive a complimentary copy of this newsletter.

Mr. Darby has served as pro bono legal counsel to a variety of Boston-area charitable organizations.  He is currently the President and a Trustee of  the Boston Police Foundation, an organization whose mission is to support the Boston Police Department and its officers.  He has also served as a Trustee of the Alzheimer's Association of Eastern Massachusetts.

Mr. Darby received his B.S. degree in Mathematics and Political Science, from the University of Illinois in 1974, with Departmental Honors in Mathematics, Magna Cum Laude, Phi Beta Kappa and Bronze Plaque (approximately top 1% of graduating class).  He graduated with honors from Harvard Law School in 1978.

Additional biographical information, including copies of numerous articles written by Mr. Darby, are available at his firm website

University of Illinois at Urbana-ChampaignBS 1974Harvard Law SchoolJ.D. 1978
Watertown Police Foundation Boston University School of Law, Graduate Tax Program

Office Location

One Post Office Square
Boston, MA 02109
United States

Practice Areas

Tax Law