Yun Byung-se (Korean: 윤병세; born 3 August 1953 in Seoul) was the Foreign Affairs Minister of South Korea.

[citation needed] From 2006 to 2008, Yun served as senior presidential secretary for foreign, security and unification policy.

[2] Yun joined the Ministry of Foreign Affairs in 1977.

Since 1984, he has worked in Sydney, New York, the United Nations, Singapore, and Geneva.

[3] Yun Byung-se visited Iran in 2015 and met with the country's Foreign Minister Mohammad Javad Zarif and the president.