| May 1963 |
Started to work at the Foreign Affairs Ministry (passed the state-administered public administration test in Dec. 1961) |
| March 1966 |
Third-grade official at the Korean Embassy in Japan |
| September 1973 |
First-grade official at the Korean Embassy in Turkey |
| February 1975 |
First-grade official at the Korean Embassy in France |
| February 1976 |
First manager, Commerce |
| May 1979 |
Official in charge of deliberating on passports |
| June 1980 |
Third consul-general of Korea in Amsterdam |
| February 1982 |
Consul-general of Korea in West Berlin |
| February 1985 |
Official in charge of the analysis of political movements |
| May 1985 |
Dispatched to the National Assembly Secretariat (secretary of the National Assembly Speaker) |
| February 1987 |
Director-general, European Affairs |
| October 1987 |
Korean Ambassador to Sri Lanka |
| December 1990 |
Minister of Korea in the U.S. |
| August 1992 |
Research general manager, West Europe, Africa, and the Middle East |
| July 1993 |
Special second-grade ambassador |
| July 1993 |
Researcher, Institute of Foreign Affairs and National Security |
| August 1994 |
Korean ambassador to Vietnam |
| January 1997 |
Senior researcher, Institute of Foreign Affairs and National Security |
| July 1997 |
Special first-grade ambassador |
| October 1997 |
Relieved of the researcher post |
| October 1997 |
Became first OKF chairman |