Po Wen Yen currently serves as UMC's senior vice president responsible for 12-inch operations. Mr. Yen joined UMC in 1986 and was responsible for the operation of fabs 8AB and 8C. He also served as the vice president for UMC-SG, UMC's 300mm operation in Singapore. In 2003, Mr. Yen received the National Manager Excellence Award from Chinese Professional Management Association.

Mr. Yen earned his bachelor's degree in Chemical Engineering from National Tsing Hua University and his masters in Chemical Engineering from National Taiwan University.