A former member of the Commission on Population (PopCom) and Executive Director of the Philippine Center for Population and Development, Inc. (PCPD), Dr. Flavier now chairs the Cooperative Movement for Encouraging NSV (no-scalpel vasectomy), promoting male involvement in safe motherhood. He is also known for his work as a health advocate on television, including Salamat Dok and Clinica Flavier on Cignal OnePh.