1972 - 1974, Teaching Assistant, UCLA, EE Department
1975 - 1976, Teaching Associate, UCLA, EE Department
1981 - 1987, Associate Professor, ASU, EE Department
1987 - Present, Professor, ASU, EE Department
Spring '91 Semester - Sabbatical Leave of Absence - Epitronics Corp., Phoenix, AZ
Fall '98 - Spring '99 Semesters - Sabbatical Leave of Absence - Lawrence Semiconductor Research Laboratory, Tempe, AZ