Dr. Najajreh started his higher education as Chemistry major at Bethlehem University. Following its closure by Israeli military order he continued his studies at the Hebrew University where he accomplished his Bachelor degree in Chemistry. He conducted his Masters and PhD in Medicinal Chemistry of anticancer agents. Following a four-year and a half of postdoctoral fellowship, and by the year 2004, he joined the Faculty of Pharmacy at Al-Quds University. He managed to establish and lead the “Anticancer Research Drugs Research Lab”. His research interest includes improving pharmacological profile of approved drugs, discovery of novel cytotoxic agents and studying their mechanism of action. Beside the co-invention of several patents, Mr. Najajreh is a co-author of more than thirty research articles, reviews and book chapters. During the years 2011-2014, Yousef was the Dean of Scientific Research and later the Dean of the Faculty of Pharmacy (August 2014 and 2017). Yousef teaches Organic and Medicinal Chemistry for pharmacy students, chemotherapeutics, drug metabolism, modern synthetic methods, and chemistry of medicinal natural products, to list few. During his academic career he supervised a number of students for masters and graduation projects in various topics. Mr. Najajreh was awarded several research visits and was invited and attended variety of local, regional and international scientific meetings. And participated in biennial meetings of WSF and International Human Rights Network of Academies and Scholarly Societies (H.R. Network). Currently, Mr. Najajreh is a researcher and leading the Anticancer Drugs Research Lab.