[1] Sassou Nguesso regained power at the end of the June–October 1997 civil war and appointed Okemba as a Special Adviser to the President in late 1997.
[3] On 21 June 2002, he met with Joseph Kabila, the President of Democratic Republic of Congo, delivering a message from Sassou Nguesso, discussing increased cooperation, and subsequently emphasizing the prospect of "good neighborly relations" between the two countries.
[8][9] Despite Okemba's influence, his activities were often not public, as Sassou Nguesso tended to assign him responsibility for "secret missions and discreet matters".
[9] Okemba was awarded France's Legion of Honour by the French Ambassador to Congo-Brazzaville, Jean-François Valette, on 10 February 2011.
[11] Together with Basile Ikouebé, the Congolese Minister of Foreign Affairs, Okemba represented Sassou Nguesso at the inauguration of Senegalese President Macky Sall on 2 April 2012.