Brahim Lejdel is currently an Professor in the Faculty of Exact Sciences, University of EL-Oued (Algeria). He holds a Magister Degree in Computer Science from University of Ourgla since 2009. He held his PhD in computer science in 2015. In 2017, he has its habitation which permits him to supervise research in PhD projects. He is the author of more than 60 papers published in refereed journals and International Conferences. He publishes three books in his research domain. He is the chairman of many international conferences. He works as invited editor, reviewer, and others in many journals and conferences. He supervised the researches of many students at the University in the last ten years.