1988-present: Member, American Statistical Association
1992-1996: Member, Central Arkansas Chapter,
American Statistical Association
1992-present: Member, The International Biometric Society,
Eastern North American Region
1994-1996: Vice President and Program Committee Chair,
Central Arkansas Chapter,
American Statistical Association
2004-2006: Member, Regional Advisory Board,
International Biometric Society, Eastern North American Region
2005: Member, NIH Biostatistical Methods and Research Design Study Section
2009: Member, NTP (National Toxicology Program), ICCVAM (Independent
Scientific Peer Review Ocular Safety Testing Methods and Approaches)