Pedro graduated with a degree in Social Work from the University of the Philippines, after which she 1969 national board examination for social workers, becoming the #10 topnotcher of all the board exam takers that year. She first worked for the National Rehabilitation Training Center, which provided services for the physical handicapped. In 1970, though, she began her work at the
Immaculate Conception Parish in Cubao,
Quezon City, where her tasks included helping run the parish's day nursery and sewing group for urban poor women, while also handling the educational program of two cooperatives. She led summer camps and leadership seminars for the urban poor and the out-of-school youth served by the Parish. She also did work for the Lady of Fatima Parish in Mandaluyong, Rizal, contributing to that parish's Christian community-building and leaders’ formation programs. == Community volunteer work ==