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Robert J. Diettrich

phone: 617-589-3861
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J.D. (cum laude), Suffolk University Law School (graduated fourth in class, member of Law Review), 1987

B.A. (with distinction in all subjects), Cornell University, 1978


Rob specializes in commercial real estate, corporate transaction, and trademark matters. He represents individuals and businesses in the formation of business entities, structuring and implementing business relationships, mergers and acquisitions, real estate and commercial loan transactions, technology licensing, and general business matters. His versatility doesn’t stop there. Rob represents clients in a wide range of industries, from software and technology, to wholesale distributors and real estate developers. He also represents public entities, including several cities and town in Massachusetts.
Rob’s clients would describe him as thorough, responsive, results-oriented, and a zealous advocate. Rob is a former law clerk to the late Charlotte Anne Perretta, former Senior Associate Justice of the Massachusetts Appeals Court.

  • Closed a $20 million business acquisition of a New York wholesale distributor with locations in Manhattan and the Bronx.
  • Assisted client in extending its business footprint into Long Island.
  • Numerous business acquisitions, real estate acquisitions, and loan financings for the largest distributor of plumbing, heating, cooling, and piping products in the Northeast.
  • Trademark registrations for numerous businesses.
  • The exercise of stock warrants by a quasi-public investment corporation.
  • The purchase and subsequent sale of a strip mall shopping center by a local real estate developer.
  • The $3 million sale of assets by a publicly held software company.
  • Represented a qualified intermediary in a Section 1031 like kind exchange.
  • The dissolution of a mechanics lien against the property of a commercial property owner.
  • The collection of sums owed on account for a pharmaceutical supply company.
  • Defense of an action to terminate license rights held by a software vendor.
  • The granting of community development loans by a state agency and local cities and towns.
  • The administration of decedents’ estates for executors and administrators.


  • Peer Review AV® Preeminent™ rated by Martindale-Hubbell, the highest bestowed rating
  • Massachusetts Super Lawyer, 2004-2005


  • Massachusetts
  • United States District Courts for the District of Massachusetts
  • United States Court of Appeals for the First Circuit


  • Boston Bar Association
  • Massachusetts Bar Association
  • International Lawyers Network

Outside the office, Rob is an active member of his church. He serves as Chancellor for the Cathedral Church of St. Paul and is a former member of the vestry of Emmanuel Church in Boston. Additionally, he opens his home as a host for Japanese exchange students studying English. In his downtime, Rob enjoys reading, biking, playing tennis and cooking.

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