In 1997, Koffigoh was chairman of the organizing committee of the ACP-EU roundtable conference that was held in Lomé. Koffigoh subsequently became Minister of State for Foreign Affairs and Cooperation in the government named on 1 September 1998. As Foreign Minister, he headed peace talks in Lomé between the government of Sierra Leone and rebels of the Revolutionary United Front in mid-1999. Koffigoh served as Foreign Minister until he became Minister of Regional Integration, in charge of Relations with Parliament, in the government named on 8 October 2000. He served in the latter position until December 2002.