Manuel Yan

Manuel T. Yan, Sr.
Presidential Adviser on the Peace Process
In office 1994–2001
President	Fidel Ramos Joseph Estrada
Preceded by	Oscar Santos
Succeeded by	Eduardo Ermita
Ambassador Extraordinary and Plenipotentiary of the Republic of the Philippines to the United Kingdom
In office 1991–1992
President	Corazon Aquino
Preceded by	Tomas T. Syquia
Succeeded by	Jesus P. Tambunting
17th Secretary of Foreign Affairs of the Philippines
In office February 2, 1987 – October 15, 1987
President	Corazon Aquino
Preceded by	Salvador Laurel
Succeeded by	Raul Manglapus
Chief of Staff of the Armed Forces of the Philippines
In office 1968–1972
President	Ferdinand Marcos
Preceded by	Segundo Velasco
Succeeded by	Romeo Espino
Personal details
Born	Manuel Tirso[citation needed] Tecson Yan (1920-01-24)January 24, 1920 Santa Cruz, Manila, Philippine Islands
Died	December 4, 2008(2008-12-04) (aged 88) Pasig, Philippines
Spouse(s)	Amelia Yan, Eloisa Fernandez
Children	5
Relatives	Rico Yan (grandson)
Alma mater	Philippine Military Academy
Military service
Allegiance	Philippines
Branch/service	Philippine Army, Philippine Constabulary
Years of service	1937–1972
Rank	General
Commands	Armed Forces of the Philippines Philippine Constabulary

Manuel Tirso^{[citation needed]} Tecson Yan, Sr. (January 24, 1920 – December 4, 2008) was a Cabinet Secretary of the Aquino, Ramos and Estrada administrations, World War II veteran and Chief of Staff of the Armed Forces of the Philippines from 1968 until 1972. He was said to be the last replaced official and obstacle to Ferdinand Marcos, and whose resignation made it possible for the ex-President to declare martial law in 1972.^[1] He holds the singular Philippine Government Record of continuous longest serving public Officer from April 1937 to January 2001 or a total 63 years and 9 months spanning twelve Philippine Presidents.