Professor Hassan El-Hofy received his BSc in production engineering from Alexandria University (Egypt) in 1976 and served as a teaching assistant in the same department. He then received his MSc in production engineering from Alexandria University in 1979. Professor El-Hofy has had a successful career in education, training, and research. Following his MSc, he worked as an assistant lecturer until October 1980 when he left for Aberdeen University in Scotland and began his PhD work with Professor J. McGeough in hybrid machining processes. He won the Overseas Research Student (ORS) Award during the course of his doctoral degree, which he duly completed in 1985. He then returned to Alexandria University and resumed work as an assistant professor. In 1990, he was promoted to an associate professor. He was on sabbatical as a visiting professor at Al-Fateh University in Tripoli between 1989 and 1994. Professor El-Hofy wrote his first book entitled Advanced Machining Processes: Nontraditional and Hybrid Processes, which was published by McGraw Hill Co in 2005. His second book entitled Fundamentals of Machining Processes-Conventional and Nonconventional Processes appeared in September 2007 and was published by Taylor & Francis Group, CRC Press. He also coauthored a book entitled Machining Technology-Machine Tools and Operations, which was published by Taylor & Francis Group, CRC Press in 2008. In 2011, he released his fourth book entitled Manufacturing Technology-Materials, Processes, and Equipment, which again was published by Taylor & Francis Group, CRC Press. Professor El-Hofy has published over 80 scientific and technical papers and has supervised many graduate students in the area of machining by nontraditional methods. He serves as a consulting editor to many international journals and is a regular participant in international conferences. Between August, 2007, and August 2010 he was the chairman of the Department of Production Engineering, College of Engineering of Alexandria University where he was teaching several machining and related technology courses. In October 2011 he was nominated as the vice dean for education and student's affairs at the college of Engineering, Alexandria University. Between December 2012 and February 2018 he was the Dean of the Innovative Design Engineering School at Egypt-Japan University of Science and Technology (E-JUST) in Alexandria, Egypt. He worked as the acting vice president of research from December 2014 to April 2017 at E-JUST. Currently he is the professor of machining technology at the Department of Industrial and manufacturing Engineering at E-JUST. Professor Helmi A. A. Youssef, born in August, 1938 in Alexandria, Egypt, has acquired his B.Sc. degree with honor in Production Engineering from Alexandria University in 1960. He completed then his scientific building in the Carolo-Welhelmina, TH Braunschweig in Germany during the period 1961-1967. In June 1964 he acquired his Dipl.-Ing. degree, then in December 1967, he completed his Dr.-Ing. degree in the domain of Non-traditional Machining. In 1968, he has returned to Alexandria University, Production Engineering Dept. as an assistant professor. In 1973 he has been promoted to associate, and in 1978 to full professor. In the period 1995-1998, professor Youssef was the chairman of the Production Engineering Dept., Alexandria University. Since 1989, he is a member of the scientific committee for promotion of professors in Egyptian universities. Based on several research and educational laboratories, which he has built, Professor Youssef founded his own scientific school in both Traditional and Non-traditional Machining Technologies. Professor Youssef has organized and participated in many international conferences. He has published many scientific papers in specialized journals. He authored many books in his fields of specialization. Currently, he is an emeritus professor in PED, Alexandria University.