From 1991 to 1994, he was a counsel to Senator Patrick Leahy on the Committee on the Judiciary, Subcommittee on Technology and the Law.
Prior to that, he spent two years as a litigation associate at Hale and Dorr in Boston.
From 2006 to 2009 he was of counsel at Paul Frank & Collins, a law firm in Burlington, Vermont.
[4] His nomination was received by the United States Senate Committee on the Judiciary on June 4, 2010.
[6][7] In January 2015 Coffin joined the Burlington office of Vermont law firm Downs, Rachlin, Martin, LLC.