Before serving as a judge of the Philippines' highest court from 1986 to 1995, he had a long career as a corporate lawyer and legal scholar.
[2] Prior to his appointment to the Supreme Court, Feliciano was managing partner of the law firm Sycip Salazar Hernandez Gatmaitan, where he worked from 1962 to 1986.
[7] Law and Minimum World Public Order: The Legal Regulation of International Coercion (Yale University Press, 1961).
(co-author with Myres McDougall) The International Law of War : Transnational Coercion and World Public Order (co-author with Myres McDougall) Deconstruction of Constitutional Limitations and the Tariff Regime of the Philippines: The Strange Persistence of a Martial Law Syndrome (sole author).
ARB/05/1, Decision on Annulment (January 7, 2015) SGS Société Générale de Surveillance S.A. v. Islamic Republic of Pakistan, ICSID Case No.
ARB/01/13 (Swiss Confederation/Pakistan BIT), Jurisdiction (August 6, 2003) Soufraki v. United Arab Emirates, ICSID Case No.
ARB/02/7 (Italy/United Arab Emirates BIT), Rectification of the Annulment Decision (August 13, 2007) SGS Société Générale de Surveillance S.A. v. Islamic Republic of Pakistan, ICSID Case No.
[8] His father was a former Head of the Department of Geology and Geography in the old College of Liberal Arts of the University of the Philippines, while his mother was a pharmacy graduate.
He was survived by his wife, Virginia Feliciano née Toralballa, children and in-laws Josephine Ann and Emmanuel, Regina Stella and Hans, and Robert.