Office:
1990 - 1994	President, Working Group on Sociology of Mental Health, International Sociological Association
1994 - 1998	President, Research Committee on Mental Health and Illness, ISA
1998 - present	Advisory Board member, Research Committee on Mental Health and Illness, ISA
Committee:
1989 - 1993	Advisor (ad-hoc), DSM-IV Working Group on Substance Use Disorders, American Psychiatric Association, DSM-IV Task Force.
1992 - 1993	Member (ad-hoc), Division of Research Grant, Special Review Section (SSS-F), National Institutes of Health.
1993 - 1997	Member (regular), Initial Review Group, Mental Health-AIDS and Immunology Review Committee, NIMH.
1994	Member (ad-hoc), Initial Review Group, AIDS and Social Networks Contract Review Committee, Contract Review Branch, NIDA, June.
1994	Member (ad-hoc), Initial Review Group, Clinical Epidemiology & Applied Science Review Branch, Special Review Committee, NIDA (SRCD-D18, D19), November.
1995	Member (ad-hoc), Initial Review Group, Clinical Epidemiology & Applied Science Review Branch, Drug Abuse AIDS Research Special Review Committee, NIDA (SRCD-D17), March.
1995	Member (ad-hoc), Initial Review Group, Division of Extramural Activities, Special Review Committee, NIMH (Minority Mental Health Research Center), April.
1995	Member (ad-hoc), Special Review Committee, Substance Abuse and Mental Health Services Administration (SAMHSA, GFA-SM-95-01), July.
1995	Member (ad-hoc), Initial Review Group, Division of Extramural Activities, Special Review Committee, NIMH (ZMH1-XCRB02, Prevention and Intervention Research Center), July.
1995	Member (ad-hoc), Initial Review Group, Clinical Epidemiology & Applied Science Review Branch, Special Review Committee, NIDA (SRCD-D16), August.
1996	Member (ad-hoc), Special Emphasis Panel, Behavioral and Applied Review Branch, NIMH (ZMH1-1(07)), July.
1996	Member (ad-hoc), Special Emphasis Panel, Behavioral and Applied Review Branch, NIMH (ZMH1-BRB-T(01), Interdisciplinary Research on AIDS Program Project), August.
1996	Member (ad-hoc), Initial Review Group, AIDS Behavioral Research Subcommittee (NIDA-J), NIDA, December.
1997	Member (ad-hoc), Research Fellowship Selection Committee, International Office, NIDA, March.
1997	Reviewer, Behavioral Science Track Awards for Rapid Transition (B/START) - NIDA, June, November.
1998	Member (ad-hoc), Contract Review Committee, Evaluation of National Youth Anti-drug Media Campaign, NIDA (N01DA-8-5063), June.
1998	Member (ad-hoc), Special Emphasis Panel, State Treatment Needs Assessment Studies: Alcohol and Other Drugs, Substance Abuse and Mental Health Services Administration (SAMHSA), July.
Program Organizer:
1992	Society for Life History Research Meeting, Chair, Ninth Session, Philadelphia, PA.
1994	The XIIIth World Congress of Sociology, Mental Health Working Group Chair, International Sociological Association, Bielefeld, Germany.
1994	College on Problems of Drug Dependence, 56th Annual Meetings, Co-Chair, Oral Communications II, Palm Beach, FL.
1996	The Third International Conference of Health Behavioral Science and Second Asian Satellite Conference of RC15 and RC49, ISA, Organizing Committee, Tokyo, Japan.
1997	College on Problem of Drug Dependence, 58th Annual Scientific Meetings, Symposium, PTSD and Substance Abuse, Chair, Nashville, TN.
1998	The XIVth World Congress of Sociology, Research Committee on Mental Health and Illness, RC Organizer, International Sociological Association, Montreal, Canada.