Bristol-Myers Company, consultant 1979-83
DuPont Central Research & Development, consultant 1980-87
FMC Corporation, consultant 1981-84
Schering-Plough Corporation, consultant 1984-96
Chevron Chemical Company - Ortho Division, consultant 1985-89
IGEN, Scientific Advisory Board, 1986-95
Celgene, Scientific Advisory Board, Member, 1987-91; Chair, 1991-96
Agouron Pharmaceuticals > Pfizer-La Jolla, Scientific Associate & consultant, 1987-88, 1992-2004
Chiron Corporation, Scientific Associate, 1988-93; consultant 2004-2005
SmithKline Beecham, Chemical Technologies Advisory Board, 1989-92
Sandoz Research Institute, Scientific Advisory Board, 1991-93; Chair, 1993
Molecular Simulations, Inc., Scientific Advisory Board, 1991-1999
Tularik > Amgen, Scientific Advisory Board, 1992-2006
Monsanto Company, consultant and Ceregen Scientific Advisory Board, 1994-97
Bristol-Myers Squibb, consultant 1997-99
Rosetta Inpharmatics, Scientific Advisory Board, 1997-2001
Argonaut, Scientific Advisory Board, 2000-2005
GlaxoSmithKline, Chemistry Consultants meeting, 2007
MannKind Corporation, Scientific Advisory Board, 2006-2007
SGX Pharmaceuticals, Scientific Advisory Board, 2003-2008
Pharmacopeia, Co-Founder; Chair, Scientific Advisory Board 1993-2008; Board of Directors 1998-2008
Sepracor, Inc., consultant, 2007-2009
Novartis Science Board, 2000-2011