Tompson helped develop the La Leche League Breastfeeding Seminars for Physicians, which have been held annually since 1973. She has served on many boards, committees and advisory councils, including the International Advisory Council for the
World Alliance for Breastfeeding Action (1996 to present).; the Advisory Board for the National Association of Post Partum Care Services (1995), the Advisory Committee for Perinatal Health, Department of Public Health for the State of Illinois (1983); and served as a consultant for the
WHO/
UNICEF meeting on Infant and Young Child Feeding in Geneva, Switzerland in 1980. In 2001, she founded AnotherLook at Breastfeeding and HIV/AIDS, a nonprofit organization focused on research regarding breastfeeding in the context of HIV/AIDS, dedicated to gathering information, raising critical questions, and stimulating research about breastfeeding in the context of
HIV/AIDS. She is president and CEO of the organization.Mrs. In 1998, Mothering magazine designated Tompson a 'Living Treasure'. Her memoir, Passionate Journey, My Unexpected Life, co-authored with Melissa Clark Vickers, was published in 2011. In 2024, Tompson resigned for La Leche League, over disagreements about breastfeeding by
trans women, writing in her resignation letter that the "shift from following the norms of nature, which is the core of mothering through breastfeeding, to indulging the fantasies of adults, is destroying our organization." ==Interviews==