31 years at the service of the National Hydrocarbons Company of Cameroon (SNH)
June 2007-December 2020: Director of the Petroleum Information Center (CIP)
June 2003-2007: Deputy Director of the CIP
1999-2003: Head of the Petroleum Information Center
1999-2001: Head of Basin Summary Department
1996-1999: Head of Mining Studies and Promotion Department (DM)
1994-1996: Deputy Head of Department for studies and promotion of the DM
1993-1994: Head of mining promotion section
April 1990: Recruitment at SNH as a Geological Executive
1995-2008: Part-time teacher of geology, mining and petroleum option, Department of Earth Sciences, Faculty of Sciences, University of Yaoundé 1. Co-supervisor of more than twenty Master's and DESS theses in mining and oil.
1987 – 1988: PARIZEK Environmental Analysis Laboratory, State College, Pennsylvania, USA; with tasks: installation of piezometers and lysometers, studies of temperatures, gas composition and water level of organic and petroleum waste dumps.