Exhibit 24.1 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS that the undersigned Officers and Directors of GSE Systems, Inc., a Delaware corporation, hereby constitute and appoint John Moran and Jeffery G. Hough, and each of them, the true and lawful agents and attorneys-in-fact of the undersigned with full power and authority in said agents and attorneys-in-fact, and in any one or both of them, to sign for the undersigned and in their respective names as Officers and Directors of the Corporation, the Annual Report of Form 10-K of the Corporation to be filed with the Securities and Exchange Commission, Washington, D.C., under the Securities Exchange Act of 1934, as amended, and any amendment or amendments to such Annual Report, hereby ratifying and confirming all acts taken by such agents and attorneys-in-fact, or any one or more of them, as herein authorized. This Power of Attorney, which is dated as of March 12, 2004, may be executed in any number of counterparts, and such signatures may be by means of facsimile or other means of transmission. Name Title /s/ Jerome I. Feldman Chairman of the Board Jerome I. Feldman /s/ John V. Moran Chief Executive Officer and John V. Moran Director (Principal Executive Officer) /s/ Chin-our Jerry Jen President, Chief Operating Officer Chin-our Jerry Jen and Director /s/ Jeffery G. Hough Senior Vice President and Chief Jeffery G. Hough Financial Officer (Principal Finance and Accounting Officer) /s/ Sheldon L. Glashow, Ph.D. Director Sheldon L. Glashow, Ph.D. /s/ Scott N. Greenberg Director Scott N. Greenberg /s/ Roger L. Hagengruber, Ph.D. Director Roger L. Hagengruber, Ph.D. /s/ Andrea Kantor Director Andrea Kantor /s/ Joseph M. Lewis Director Joseph M. Lewis /s/ John A. Moore, Jr. Director John A. Moore, Jr. /s/ George J. Pedersen Director George J. Pedersen /s/ Douglas Sharp Director Douglas Sharp