| Honorific-Suffix: | PChW MPCh MWM PMN GCIH |
| Siddhi Savetsila | |
| Native Name Lang: | th |
| Honorific-Prefix: | Air Chief Marshal |
| Birth Date: | 7 January 1919 |
| Birth Place: | Bangkok, Thailand |
| Death Place: | Bangkok, Thailand |
| Office: | Deputy Prime Minister of Thailand |
| Primeminister: | Prem Tinsulanonda |
| Term Start: | 15 January 1986 |
| Term End: | 5 August 1986 |
| Office1: | President of the United Nations Security Council |
| Predecessor1: | Javier Arias Stella |
| Termstart1: | 1 May 1985 |
| Termend1: | 31 May 1985 |
| Office2: | Minister of Foreign Affairs |
| Term Start2: | 11 February 1980 |
| Term End2: | 26 August 1990 |
| Predecessor2: | Upadit Pachariyangkun |
| Successor2: | Subin Pinkayan |
| Office3: | Minister to the Office of the Prime Minister |
| Primeminister3: | Kriangsak Chamanan |
| Term Start3: | 30 January 1980 |
| Term End3: | 11 February 1980 |
| Predecessor3: | Boonrueang Buajaroon Somporn Boonyakup Thawin Rainanon |
| Successor3: | Peeda Kanasut Yos Devahastin na Ayudhya Boonying Nanthapiwat Pramual Kullamas Porn Thanapoom |
| Office4: | Secretary-General of the National Security Council |
| Term Start4: | 11 December 1974 |
| Term End4: | 30 January 1980 |
| Predecessor4: | Lek Neawmalee |
| Successor4: | Prasong Soonsiri |
| Party: | Social Action (1983–1990) |
| Otherparty: | Free Thai Movement |
| Allegiance: |  Thailand |
| Rank: | Air Chief Marshal[1] |
| Branch: | Royal Thai Air Force |
| Signature: | Sithi Sawetsila signature.png |
| Education: | MIT |
Siddhi Savetsila (th|สิทธิ เศวตศิลา,, pronounced as /th/, 7 January 1919 – 5 December 2015) was a Thai air force officer and politician. After finishing his military career with the rank of air chief marshal, he served as the foreign minister of Thailand from 1980 to 1990. In 1991, he became a member of the Privy Council of King Bhumibol Adulyadej. He was the president of the united nations security council in 1985 with Mom Luang Birabhongse Kasemsri.[2]
Siddhi Savetsila was born in Bangkok. He is a member of the Thai aristocracy. His father was a high-ranking official in the royal government. His paternal grandfather was Henry Alabaster who was the British consul in Siam during the reign of King Rama IV (Mongkut) and then served as an advisor to King Rama V (Chulalongkorn). His mother was an offspring of the influential Bunnag family. He is a direct descendant of Somdet Chao Phraya Borom Maha Prayurawongse.
Siddhi studied metallurgic engineering at the Massachusetts Institute of Technology (MIT), graduating with an S.B. degree in 1943. During the Second World War, he joined the Free Thai Movement (Seri Thai) which resisted against the de facto occupation of Thailand by Japanese forces. He collected data for the US foreign-intelligence agency OSS (predecessor of the CIA) and was temporarily detained by the Japanese. Two of Siddhis sisters married US intelligence operatives, one was the wife of former OSS agent Willis Bird and one of CIA officer William Lair. After the end of the war, he returned to the MIT and received his S.M. degree in 1947.
Siddhi holds honorary doctorate degrees from the University of the Philippines, the National University of Singapore and five universities in Thailand.
He then served in the Royal Thai Air Force and rose up to the rank of air chief marshal (phon akat ek).
From 1975 to 1980 he served as secretary-general of the National Security Council. In this position he assisted Prime Minister Kriangsak Chomanan at the time of the Vietnamese invasion of Cambodia during 1978 to 1979.
In 1980, Kriangsak appointed him minister of foreign affairs. He kept this position when Prem Tinsulanonda took over the premiership a few months later. As Thailand' representative in the United Nations (UN) and ASEAN, Siddhi advocated a tough line towards Vietnam which was occupying Cambodia after 1979. In 1983, Siddhi was elected member of parliament and in 1985 he took over the leadership of the Social Action Party (SAP) following the retirement of Kukrit Pramoj. The party did well in the 1986 election and Siddhi additionally became deputy prime minister for a short time.
In August 1990, the new Prime Minister Chatichai Choonhavan dismissed Siddhi as he sought a more pragmatic relationship with the communist-ruled countries of Southeast Asia. Siddhi's SAP was in great difficulties during the late 1980s and, in September 1990, Siddhi gave up his leadership. One month later, he completely retired from the parliament and the party, stating that he was tired of politics. In 1991 King Bhumibol appointed him to his privy council.[3]
He died on 5 December 2015 at the age of 96.[4]
He was decorated with the Order of Chula Chom Klao (first class), the Order of the White Elephant (special class) and the Order of the Crown of Thailand (special class), as well as foreign decorations from 14 countries.[3]
On 8 May 2000, he was among the five Free Thai veterans who were awarded the Agency Seal Medallion by CIA director George Tenet.
United States :
Portugal: