Sonia is active in educational, social, cultural, and environmental causes. As past president and founding member of the 20-year-old Women in Nation Building (WIN), she is a sought-after resource person on
women's issues. In
healthcare, she is a frequent guest speaker owing to her first-hand experience as primary
caregiver to then ailing husband
Raul. Sonia co-founded Saint Michael's Hospice in 1996 to help the poor and terminally ill. She maintains active relations with the Student Catholic Action Leadership Foundation, an organization which strives to revive the SCA among the contemporary Filipino youth. She is the executive director of Student Catholic Action of the Philippines. Dr. Patricia Licuanan and Sonia set up the Metro Manila Community Orchestra. With Corazon Alma de Leon and Tony Arevalo, her radio program, “Kapitan del Baryo,” aimed to strengthen
grassroots democracy. Since Sonia studied
Dramatics in the UK, she later enrolled in the writing class of Barbara Gonzalez, composing series of
poems. ==Electoral history==