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Mr. S.J. Paul Chien is Chairman and President of Vanguard International Semiconductor Corporation. Mr. Chien joined Vanguard in January 1995 as Vice President of Sales and Marketing soon after the company was founded. He was named President in March 2000 to orchestrate the transformation of Vanguard from a DRAM company to a specialty IC foundry company. Mr. Chien was named Chairman in June 2003. Prior to joining Vanguard, Mr. Chien held various engineering and managerial positions in Intel and TSMC.

Mr. Chien received his Master of Science degree in Chemical Engineering and Chemical Engineer's degree from Massachusetts Institute of Technology.