EXHIBIT 24.1 POWER OF ATTORNEY Each person whose signature appears below constitutes and appoints Dennis W. Bakke, Barry J. Sharp and William R. Luraschi and each of them, his or he true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign and file a registration statement on Form S- 3 relating to securities to be offered by TheAES Corproation and any and all amendments (including post-effective amendments) thereto, to sign any related registration statement filed pursuant to Rule 462(b) under the Securities Act of 1933, and to file the same with all exhibits thereto, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitutes or substitutes, may lawfully do or cause to be done by virtue hereof. Signature Title Date --------- ----- ---- /s/ Roger W. Sant ---------------------------- Chairman-of-the-Board June 29, 1999 Roger W. Sant /s/ Dennis W. Bakke ----------------------------- President, Chief Executive Officer and June 29, 1999 Dennis W. Bakke Director (Principal Executive Officer) /s/ Alice F. Emerson ----------------------------- Director June 29, 1999 Alice F. Emerson /s/ Robert F. Hemphill, Jr. ----------------------------- Director June 29, 1999 Robert F. Hemphill, Jr. ----------------------------- Director Frank Jungers ----------------------------- Director John H. McArthur 1 Signature Title Date --------- ----- ---- /s/ Hazel O'Leary ----------------------------- Director June 29, 1999 Hazel O'Leary ----------------------------- Director Thomas I. Unterberg ----------------------------- Director Robert H. Waterman, Jr. ----------------------------- Vice President and Chief Financial Barry J. Sharp Officer (Principal Financial and Accounting Officer)