[3] A judge at the Seoul District Court in 1979 and 1980, Kwon became Assistant Legal Advisor to President Chun Doo-hwan of Korea, a position he held until 1984.

Currently a member of Trial Chamber II, Judge Kwon sits on the bench hearing the case of Prosecutor v. Popović et al.

In addition to his work at the ICTY, Judge Kwon has served as a member of the Board of Editors of the Journal of International Criminal Justice (Oxford) since 2007.

The International Criminal Tribunal for the former Yugoslavia (ICTY) is an entity which is chartered as a court of law by the United Nations to investigate and prosecute war crimes, which occurred throughout the Balkans in the 1990s.

As one of the Tribunal's judges his responsibilities included determining the guilt or innocence of those accused of perpetrating war crimes during the Balkan conflict, and he was tasked with passing sentence on the convicted.

The ICTY judges agreed to join the nine defendant's trials linked to the Srebrenica massacre, who were all senior Bosnian Serb army, VRS, and police officers.

Others under concurrent indictment in this case with the same or similar charges are Ljubiša Beara, Ljubomir Borovcanin, Milan Gvero, Radivoje Miletic, Drago Nikolić, Vinko Pandurević, Zdravko Tolimir and Milorad Trbić.