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Joseph B. Darby III, Esq. is a senior partner in the Boston office of Sullivan & Worcester, LLP, and has been admitted to the practice of law in Massachusetts since 1979. He concentrates his legal practice on tax and business law, and advises individuals and business entities on a wide variety of tax-related matters, including income-tax planning for business and real estate transactions, estate planning, wealth preservation, and represents taxpayers in tax controversies with the IRS and state tax authorities. He is recognized as one of the Best Lawyers in America in the area of tax practice by Best Lawyers®, the oldest and most respected peer-review publication in the American legal profession Mr. Darby is the author of the highly regarded Practical Guide to Mergers, Acquisitions and Business Sales, the Second Edition of which was published in 2017 by The National Underwriter Company, a Division of ALM Media, LLC, and he is a recognized authority in the structuring of mergers, acquisitions, business sales, and related business transactions. He teaches a course entitled Tax Aspects of Buying and Selling a Business at the Boston University School of Law Graduate Tax Program (GTP).


Mr. Darby is also a recognized authority on the taxation of intellectual property, including tax issues related to the development, licensing and exploitation of intellectual property rights, and the migration of valuable intellectual property to offshore jurisdictions. 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. Mr. Darby has been the recipient of numerous journalism and writing awards, including recognition as “Tax Writer of the Year” in 2007 and 2011 by Practical International Tax Strategies, a Thomson Reuters publication. He has authored two books and more than 1,000 articles for 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. Mr. Darby was a sports writer in an earlier life, and wrote sports columns for numerous publications including The Boston Herald, The Boston Phoenix, Hemispheres Magazine and Worcester Magazine. The New England Press Association honored him with the First Place award in the category of Sports Columns in 1990, beating out all other competitors that year.


Mr. Darby is the editor of an entertaining and informative tax blog entitled “Tax and Sports Update,” a fun and readable tax blog that is billed, tongue in cheek, as “The ONLY tax newsletter with an awardwinning sports column.” The blog is at Mr. Darby has served as pro bono legal counsel to a variety of Boston-area charitable organizations. He is currently a Board Member of the Watertown Police Department and the Watertown community at large to cope with the challenges faced in the aftermath of the events of April 19, 2013. He is a former President of the Boston Police Foundation (2008-2012), and served in a similar capacity for that organization.