After working at a uranium mining company as Deputy Director-General beginning in 1981, he was appointed as a special adviser on mining to President Omar Bongo in 1988, and he was professor of industrial economics at the Institut National Supérieur de Gestion, part of the University of Libreville, from 1989 to 1990.
Subsequently he worked in Belgium as the CEO of Wongo International and professor of experimental physics at l'Athénée Royal d'Ath from 1991 to 1993.
[1] Following extended negotiations, the United Nations Human Rights Council appointed Tonda as one of six members of a team to investigate violence in Darfur in late January 2007.
[4] Tonda was appointed to the government of Gabon as Minister of Lodgings, Housing, and Urban Planning on 28 December 2007.
[5][6] He was then moved to the position of Minister of Trade and Industrial Development, in charge of NEPAD, on 7 October 2008.