Bishop Mesiona has been an advocate for social, environmental, and historical causes in Palawan. He had advocate for preserving Palawan's Christian heritage. In August 2022, he led the launch of a year-long celebration of the 400th anniversary of Christianity in Palawan. The commemoration began at St. Augustine Church in
Cuyo town, the oldest parish in the province, and featured a pilgrimage of the Mission Cross throughout the island. In January 2023, he formally requested the Puerto Princesa city government to rename Taft Street to
Saint Ezekiel Moreno Street in honor of the first missionary priest in the area. The proposal was meant to reflect the city's religious history, as the street passes by the Immaculate Conception Cathedral and a park dedicated to
Princess Eulalia of
Spain. In June 2024, he launched a pastoral program dedicated to the welfare of seafarers and fishers within the Apostolic Vicariate of Puerto Princesa. This initiative aimed to provide spiritual and pastoral care to maritime workers in the region. On December 1, 2024, he joined the Apostolic Vicar of
Taytay Broderick Pabillo and his predecessor Juanich in launching a signature campaign calling for a 25-year moratorium on mining operations in the province to protect its rich biodiversity and natural resources. == References ==