1986- scholarship for postgraduate studies (4 years) in France from Algerian government. 1987- Diploma of Advanced Studies in Oceanology (sedimentology and ecology of current and ancient marine environments), University of Bordeaux I, France 1991- Ph D in Biology of Populations and Ecosystems, University of Bordeaux I, France 1991-1997- Assistant Professor, Institute of Natural Sciences, Badji Mokhtar-Annaba University, Algeria 1998-2003- Associate Professor/Researcher, Badji Mokhtar-Annaba University 2004-2023- Full Professor/Senior Researcher, Badji Mokhtar-Annaba University, Algeria 2012-2023- Head of the Laboratory: Biogeochemical and Ecological Analyzes of Aquatic Environments 1994-2020- responsible for several local projects including 2 projects within the National Research Program (1999-2001 and 2011-2013) and 2 projects for the Ministry of Environment and Regional Planning (2003-2005 and 2007-2009).