TBS logo Tampa Bay Skeptics (Founder 1988; Executive Director and Editor of Tampa Bay Skeptics Report  1988-2013)

CSI logo Committee for Skeptical Inquiry (CSI) -- formerly known as CSICOP (publishers of Skeptical Inquirer  magazine) (UFO Subcommittee member 1980s-'90s, Scientific Consultant 1992-2018) -- Why I resigned in protest

ACSH logo American Council on Science and Health (Scientific Advisor 1997 to present)

Faith-healing Investigation Project, Committee for the Scientific Examination of Religion (CSER) (sponsored by the Council for Secular Humanism and Free Inquiry  magazine) (Member 1986-90)

Mensa logo Mensa (Member since 1982; Founder and National Coordinator of a "Skeptics" Service 1987-2011) (Read my Mensa "Skeptically Speaking" essays)