Joesph has served as a member of the Tessera board of directors since August 2001. He founded, and is currently a director at, Vitesse Semiconductor Corporation. Prior to this position, Joseph established Enhanced Energy Systems, Unitive Electronics, Inc. and Quad Design Ltd. He has worked in the semiconductor industry for more than 40 years, 15 of which he spent focused specifically in the semiconductor packaging industry. Joseph has published 32 papers, was a fellow of the American Institute of Physics, where he won the Chairman Award and National CIT Award, and has served on several government committees. He holds a doctorate in physics from Case Western University.