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Jeffrey C. O'Brien


Jeff O’Brien is a partner with Chestnut Cambronne and serves as outside general counsel to a wide variety of small and closely held businesses as well as real estate investors and developers. He has significant experience working with craft breweries, distilleries, and a variety of other liquor and hospitality focused businesses on an array of issues including entity formation, financing, real estate matters, intellectual property protection, operational issues, securities law, and distribution contracts. Jeff also advises clients in the industrial hemp and cannabis industries and is a member of the Minnesota Industrial Hemp Association’s Board of Directors.

Jeff’s practice is regional and national in scope. In addition to Minnesota, Mr. O’Brien is admitted to practice in the States of Iowa, North Dakota, South Dakota and Wisconsin, and before the United States District Court for the District of Minnesota, the District of South Dakota and the Northern and Southern Districts of Iowa. He is a member of the Board of Directors of the State Bar of Wisconsin’s Non-Resident Lawyers Division (NRLD), and he regularly assists businesses across the United States on matters pertaining to Federal securities law, with an emphasis on exempt offerings under Regulation D and Regulation CF.

A frequent lecturer and writer, Jeff has presented and written articles on a variety of business and real estate topics. He has a blog site, Jeffrey O’Brien Today, and a craft beverage law website which contains his articles, podcasts and other resources pertinent to craft beverage law.

Jeff has been listed as a Minnesota Super Lawyer eight times, including 2023. Previously he had been named a “Rising Star” by Minnesota Super Lawyers every year from 2008-12, a designation reserved for only 2.5% of all attorneys in Minnesota. He was named as one of the “40 Under Forty” in 2014 by the Minneapolis-St. Paul Business Journal and a Minnesota Monthly Top Lawyer for 2023.

Jeff regularly appears as the “Lawyer Extraordinaire” on Jon Justice in the Morning (NewsTalk 1130 AM) and The BS Show podcast with Bob Sansevere.