Antonio Gabriel Maestrado La Viña (born October 22, 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 the 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, Ateneo de Zamboanga, Liceo de Cagayan, and the Philippine Judicial Academy. In addition to these teaching responsibilities, La Viña is the director