Kaeser subsequently held various business administration management positions, including a term at the Siemens Components Operations in Malacca, Malaysia (1987–1988). In 1990 he was appointed Vice President of business administration of the Opto Semiconductors Division. In 1994 Kaeser served first as Executive Vice President and Chief Financial Officer, and later as CEO of the group's American subsidiary Siemens Components, located in Cupertino, California, as well as at Siemens Microelectronics, in neighboring San Jose.[1]