Senator, United States Senate, 2009-2010

Appointed, Senator, United States Senate, September 24, 2009

Chair, Democratic Party of the United States, 1985-1989

Treasurer, Democratic Party of the United States, 1983-1985

National Political Director, Senator Edward M. Kennedy for President Campaign, 1980

Senator Robert F. Kennedy for President Campaign, 1968

Kenneth P. O'Donnell for Governor Campaign, 1966

Co-Chair, Commission on Presidential Debates, 1987-present

Chair, Kirk and Associates, Incorporated

Assistant District Attorney, Middlesex County, Massachusetts

Chair, National Democratic Institute of International Affairs, 1992-2001

Partner/Practicing Attorney, Sullivan and Worcester Limited Liability Partnership, 1977-1990

Special Assistant, Senator Edward M. Kennedy, 1969-1977

Chair/Board Member, John F. Kennedy Library Foundation, 1992-present

Founding Member, Board of Directors, Edward M. Kennedy Institute for the United States Senate, present

Former Chair, Harvard University Board of Overseers' Nominating Committee

Former Trustee, Saint Sebastian's School

Trustee Emeritus, Stonehill College