William W. McGuire M.D. has been a Director of Unitedhealth Group Inc., since 1989, and Chairman of the Board since May 1991. Mr. McGuire has been Chief Executive Officer of Unitedhealth Group Inc., since February 1991. Dr. McGuire joined Unitedhealth Group Inc., as Executive Vice President in November 1988. Dr. McGuire also served as Unitedhealth Group Inc.'s Chief Operating Officer from May 1989 to June 1995 and as President from November 1989 until May 1999.