EXHIBIT 24 POWER OF ATTORNEY The undersigned, acting in the capacity or capacities stated opposite their respective names below, hereby constitute and appoint BARRY J. SHARP and WILLIAM R. LURASCHI and each of them severally, the attorneys-in-fact of the undersigned with full power to them and each of them to sign for and in the name of the undersigned in the capacities indicated below the Company's Annual Report on Form 10-K and any and all amendments and supplements thereto. SIGNATURE TITLE DATE - --------- ----- ---- /s/ Roger W. Sant Chairman of the Board and - ----------------- Director February 4, 2000 (Roger W. Sant) /s/ Dennis W. Bakke President, Chief Executive February 4, 2000 - ------------------- Officer and Director (Dennis W. Bakke) /s/ Alice F. Emerson Director February 4, 2000 - -------------------- (Alice F. Emerson) /s/ Frank Jungers Director February 4, 2000 - ----------------- (Frank Jungers) /s/ Robert F. Hemphill, Jr. Director February 4, 2000 - --------------------------- (Robert F. Hemphill, Jr.) /s/ Dr. Henry R. Linden Director February 4, 2000 - ----------------------- Dr. Henry R. Linden) /s/ Hazel R. O'Leary Director February 4, 2000 - -------------------- (Hazel R. O'Leary) /s/ Thomas I. Unterberg Director February 4, 2000 - ----------------------- (Thomas I. Unterberg) /s/ Robert H. Waterman, Jr. Director February 4, 2000 - --------------------------- (Robert H. Waterman, Jr.)