Dr. Mellal is a Ph.D. in Mechatronics. He is an Associate Professor (with Accreditation to Supervise Research) at the Department of Mechanical Engineering, Faculty of Technology, M'Hamed Bougara University, Algeria and Former Visiting Scholar at the Center for Advanced Life Cycle Engineering (CALCE), Department of Mechanical Engineering, University of Maryland, College Park, MD, USA. Likewise, he was a Visiting Scholar at Osaka Electro-Communication University, Japan; Korea Aerospace University, South Korea; and University of Essex, UK. He is a member of the Algerian National Laboratory for Maintenance Education in conjunction with the European Union (Erasmus+). He has published in several journal and conference proceedings. He has authored/edited three books and authored four book chapters. Dr. Mellal was an Invited Keynote Lecturer at the plenary sessions of the Day of Science 2015, Boumerdes, Algeria and in the International Symposium on Technology and Sustainable Industry Development, ISTSID 2019, El-Oued, Algeria. He was a Session Chair for the 2nd and 3rd International Conference on System Reliability and Safety, ICSRS 2017 and 2018, Milan (Italy) and Barcelona (Spain), respectively. He has been selected as Best Reviewer for the International Conference on Vision, Image and Signal Processing, ICVISP 2017 and 2018, Osaka (Japan) and Las Vegas (USA), respectively. He has also been a committee member for over eighty international conferences. He serves as a regular reviewer for twenty-three SCI-indexed journals and an editorial board member of seven peer-reviewed international journals. His research interests include developing new nature-inspired optimization methods for solving engineering problems of system dependability, design, manufacturing, and energy efficiency.