Dr. Yum joined DURECT in 1999. Since then, he has continuously been involved in the application of several of DURECT's platform technologies such as DUROS®, SABER® and DURIN®. Su IL's significant contributions have played a huge role in the development of various parenteral and oral drug delivery systems that are based on these DURECT technologies.

Prior to joining DURECT, Dr. Yum served as Senior Technical Advisor at Amira Medical in Scotts Valley, California, where he participated in the development of a pain-free blood glucose detector called AtLast®.

Prior to joining Amira, he held a number of senior positions in project management and engineering at Alza Corporation ("Alza"). His contributions at Alza include the development of a number of Alza's enabling technologies and commercial products, most notably transdermal patch products such as, Nicoderm® nicotin and Duragesic® fentanyl systems. Other products include; Travenol Infusor®, which Alza licensed to Baxter, and ALZET® osmotic pumps, used for experimental research in laboratory animals. His fundamental insight into mass transport phenomena and product design were instrumental to his success in exploratory research, and development activities at Alza.

Dr. Yum earned his Ph.D. degree in Chemical Engineering from the University of Minnesota, and completed a Post-doctoral research in Biomedical Engineering at the University of Utah. He has more than 40 scientific publications and is the holder of more than 60 U.S. and foreign patents. Dr. Yum is a Fellow of the AAPS.