Antonio Gabriel Maestrado La Viña (born October 2, 1959) is a Filipino lawyer, educator, and environmental policy expert. A former Undersecretary of the Department of Environment and Natural Resources (DENR), Executive Director of Manila Observatory, and Dean of the Ateneo School of Government, he currently teaches law, governance, and philosophy in the Ateneo de Manila University, University of the Philippines, De La Salle University, Xavier University, San Beda University, Polytechnic University of the Philippines, Lyceum of the Philippines University, Pamantasang ng Lungsod ng Maynila (City University of Manila), Far Eastern University, and the Philippine Judicial Academy. In addition to these teaching responsibilities, La Viña is the director of the Energy Collaboratory of the Manila Observatory. He is also the Chair (until June 2019) of the Partnership Council, Partnership for the Environmental Management of the Seas of East Asia. Likewise, he is Chair of the Board of Trustees of Forest Foundation of the Philippines.