Leonardo A. Quisumbing (November 6, 1939 – January 20, 2019)[1] was an Associate Justice of the Supreme Court of the Philippines.
He was appointed by President Fidel Ramos in 1998 and retired as the most senior Associate Justice of the Court on his 70th birthday in 2009.
He was a prominent campus figure as an undergraduate student at the Manuel L. Quezon University, where he edited The Quezonian.
Before his present appointment, he also held the rank of Commodore of the Philippine Coast Guard, 106th Auxiliary Squadron.
While serving as a trade union officer, he attended international law and labor conferences in Geneva, Moscow, Beijing and Jakarta.
He was the former chairman of the Confederation of Industry Unions of the Philippines, (CINUP), former president of the National Alliance of Teachers and Allied Workers (NATAW), and former secretary-general of the Lakas Manggagawa Labor Center (LMLC).