Violeta became involved with the Bacolod diocese’s program for sugar workers run by then Fr. Luis Jalandoni, diocesan social action director. She once attended a seminar of Catholic religious and layworkers where she heard sugarworkers explain their situation. “That was my wake-up call (Doon ako namulat),” she later revealed. Being a natural leader and a teacher, she was soon giving similar seminars to her fellow nuns and priests in Negros.
Under martial law, the social conflict in Negros became worse, as landowners close to the regime grew even more abusive and seized lands with even more impunity. Soldiers poured into the island, terrorizing communities, and arresting protest leaders and their supporters, including priests, seminarians, students and union organizers.
In 1975, Violeta gave up school work altogether and became a fulltime secretary of the Justice for Sugar Workers Committee, a new group composed of religious and lay workers sympathetic to the plight of sugarworkers. She helped establish the Negros Occidental Women Religious Association (NOWRA), which then created several committees, including a justice and peace committee which undertook the care of political prisoners. Violeta also became part of the Task Force Detainees of the Philippines under the Association of Major Religious Superiors of the Philippines.
By 1976, abuses in Negros have become very serious. Civilians were getting shot and killed for the flimsiest reasons. Parishes that supported people-oriented activities were being threatened. Soldiers tortured a 19-year-old female catechist in Kabankalan. Violeta joined a church team that searched for the catechist, including at the constabulary headquarters, signed letters and sent urgent telegrams to martial law officials such as Juan Ponce Enrile. The catechist was found after ten days in a hospital, badly beaten and emotionally broken. Violeta helped minister to her as the young woman sought to recover psychologically. Violeta cared for another woman shot on the foot by soldiers, having to recover for a year in hospital. In 1978, she handled the documentation and protest campaign in an attempted summary execution of other Catholic lay leaders.
Working fulltime now as a human rights worker, Violeta often had to face danger herself. She opened her convent to victims of atrocities, and convinced fellow religious and lay leaders in Negros to do the same. She helped create a human rights network in Negros that documented the abuses, found legal aid for the victims, gave support to the victims and their families through prison visits, assistance with medicine and clothing, and other kinds of humanitarian support. Human rights workers like Sr. Violeta risked their lives every day, facing possible arrest and detention themselves, even abduction, or sexual abuse, or assassination. Living in a small convent with only her strong spirit for defense and protection, Sr. Violeta pushed on despite the daily risks of her work.
By the late 1970s, Violeta was herself joining protest rallies against military abuses and against the continued landgrabbing and other abusive practices of Negros landowners. The martial law government had sent a special team, the Long Range Patrol, that promoted the slogan Walang Patawad and cracked down even harder on the protests in Negros. In 1980, 12 people were summarily executed within weeks of each other. The jails in the province were packed with political prisoners. The human rights network of which Violeta was part had its hands full handling both the humanitarian aspect and the protest campaigns. They even documented anomalies in military camps, as in a jail warden profiting from a hollow-block-making project supposedly for the prisoners’ benefit.
Violeta is considered as having helped win then Bacolod bishop Antonio Fortich to the cause of justice in Negros. A priest who was a human rights supporter had built a considerable collection of pictures of human rights cases and protest actions in the island. He and Violeta made them into albums and made duplicate albums for Bishop Fortich, giving him complete and updated information about the abuses. This, among others, convinced the bishop that the church in Negros had to take the side of the poor.
In the early 1980s, Violeta left Negros to take up new duties in Manila. In Manila, she continued to be active in human rights advocacies under the Task Force Detainees of the Philippines and Balay Rehabilitation Center, as member of the justice and peace commission of the Association of Major Religious Superiors of the Philippines, and as director of the Tahanan Social Services at the La Consolacion Convent.
She also focused her energies in instituting reform within her own religious order. In 1989 she and a group of sisters of her order sought permission from the Vatican to create a new order, the Augustinian Missionaries of the Philippines (AMP). This was granted in 1999, and Violeta became its first superior general.