In addition to serving as its President, Mr. Greco has long been active in the American Bar Association, including serving on the Board of Governors, in the House of Delegates for more than twenty years, and as the elected ABA State Delegate from Massachusetts during 1993-2004. He chaired the Association's Standing Committee on Federal Judiciary, the Section of Individual Rights & Responsibilities, the Executive Committee of the Conference of State Delegates, the Steering Committee of the Nominating Committee, the ABA Day in Washington Planning Committee, and other committees. Following the September 11, 2001 terrorist attacks in the US, he served on the ABA Task Force on Terrorism and the Law, and helped develop policies relating to the imperative of balancing national security and constitutional freedoms so that both are protected.