National Academy of Sciences / National Research Council Committee on Health Effects of Waste Incineration; member 1995 - 1999.

Air and Waste Management Association; Chair, Municipal and Medical Waste Management Division, 2003-; Vice Chair, 2000-2003, and 2006- ; Chair, Integrated Waste Management Technical Committee, 1994 - 2000; Chair, Solid Waste Incineration Technical Committee 1990 - 1992; Vice Chair, Solid Waste Inter-committee Task Force, 1992 - 1994; Session Chair for 1988 - 1992; 1994 - 1996 AWMA Annual Meeting Sessions. Article Peer Reviewer for AWMA Educational Materials and APCA Journal.  

National Recycling Coalition, member since 1993. Speaker at Annual conference 1996, 1998, 1999      Member, Source Reduction Council, 1996 -. Steering Committee 2000-

New York State Assn of Reduction, Reuse and Recycling 2003-; Pennsylvania Resources Council, Member, 1997-2004

American Society of Mechanical Engineers (ASME) Municipal and Industrial Waste Research Committee. 1986 - . Operator Certification Committee. 1987 - 1998.

Manhattan Citizens Solid Waste Advisory Board, 1988 -. Chair, 1992 - 1994; Vice Chair 1994 - 1996,  2001-2003; 2005-

New York Citywide Recycling Advisory Board, 1990-. Steering Committee, 1991 - 2005; Vice Chair 2001 - 2003.

New York City Waste Prevention Coalition, 2000 -; Vice chair 2001-2003. Co-chair 2004-2005

    Sierra Club, Atlantic Chapter Solid Waste committee - 2005-

9/11 Environmental Action, Founding member and Steering Committee member, 2002-

American Association of Geographers, member, 1999-2004

US EPA/National Recycling Coalition Task Force to Develop and Promote a National Source Reduction Procurement Strategy, 1996 - 1998.

New Jersey DEPE Mercury Emissions Standard-Setting Task Force, member, 1992 - 1994.

Riverside-Inwood Neighborhood Gardens, Inc. Founder, President, and Fundraiser for two community gardens in upper Manhattan 1984 - . Award Winner of Citywide "Dress Up Your Neighborhood Contests" in 1985, 1987, 1990, 1992, 1994, 1995, 1997, 1998.