Gerard van den Aardweg has worked as a therapist for almost 50 years, specializing in cases of homosexuality and marital problems. He has a global reputation and has written extensively on homosexuality and paedophilia, as well as related topics such as same-sex attraction in the priesthood and gay parenting. His books include The Battle for Normality: Self-Therapy for Homosexual Persons and Homosexuality and Hope: A Psychologist Talks About Treatment and Change. He has been a member of the Scientific Advisory Committee of NARTH (National Association for Research and Therapy of Homosexuality) since the organization was founded in 1992. He is also the European editor of the Empirical Journal of Same-Sex Sexual Behavior.