Member, Brookline Town Meeting, 1981-present

Elected Member, Brookline Democratic Town Committee

Representative, Commonwealth of Massachusetts House of Representatives, District Fifteenth Norfolk, 2000-2019

Member, Brookline School Committee, 1992-2000

Former Chair, Global Warming and Climate Change Committee, Commonwealth of Massachusetts House of Representatives

Chair, House Committee on Global Warming and Climate Change, present

Commissioner/Chair, Brookline Housing Authority, 1982-1992

Member, Housing Advisory Board, Town of Brookline, 1984-1986

Lawyer, Kurnos, Rosenberg, Libby, 2000-present

Lecturer, Boston College Law School, 1990-present

Lawyer, Law Office of Frank I. Smizik, 1994-2000

Lecturer, Suffolk School of Management Business & Government Ethics, 1996-1997

Lawyer, Massachusetts Law Reform Institute, 1978-1994

Lawyer, Neighborhood Legal Services, 1970-1978

Newsman, United Press International, 1969-1970

Member/President, Jewish Alliance for Law and Social Action, 2013-present

Member, Citizens for Public Schools, 2008-present

Member, American Jewish Committee

Member, Environmental League of Massachusetts

Member, Massachusetts League of Environmental Voters

Member, National Jewish Democratic Council