National Recycling Coalition, Board member- 2012 -; co-chair of disaster debris task force.  Annual conference speaker: 1996, 1998, 1999, 2003.  Member, 1993-.   Member, Source Reduction Council, 1996 - 1998.

New York State Association for Reduction, Reuse and Recycling, board member, 2012-; member Legislative committee 1993-, New York City regional representative. 2012-.

Air & Waste Management Association, Chair Municipal and Medical Waste Management Division, 2003-06 and 2009-2012; Vice Chair, 2012- ; 2006-09,  Chair, Integrated Waste Management Technical Committee, 1994 - 2000.

Author of numerous publications and presentations at professional conferences and meetings since 1984.  Recent subjects include avoiding and minimizing disaster waste, zero waste systems, policy and planning, minimizing climate change by reducing waste impacts.

Co-author of environmental procurement bills for city agencies introduced in 1995 and 1998.

Co-author of a ~200 page long-range citizens' zero waste plan for NYC, 2004.  

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

Air and Waste Management Association; Vice Chair, Sustainability and Resource Conservation Division, 2013-;  Chair, Municipal and Medical Waste Management Division, 2003-2006, 2009-2012; Vice Chair, 2000-2003, and 2006-2009 ; 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.  

Pennsylvania Resources Council, Member, 1997-2004

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

9/11 Environmental Action, Founding member and Steering Committee member, 2002-2006.

World Trade Center Community and Labor Coalition, 2005 - 2009.

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

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.  Major capital grant recipient from Manhattan Borough President, 1996-1997.

DIN (Dyckman Inwood Noise) Action 2008 -  Co-founder.

Inwood Livable Streets 2008 - 2011.  Co-founder.

Manhattan Citizens Solid Waste Advisory Board, 1988 -.2007; 2014 - .   Chair, 1992 - 1994; Vice Chair 1994 - 1996,  2001-2003; 2005-2006

Waste Prevention Committee, Chair, 1991 - 2006. Member: 1988 - 2006. 

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

Sierra Club, Atlantic Chapter Solid Waste committee - 2005-

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.

Northern Manhattan Photographers Group, 2007 -.