EXHIBIT 24 SIGNATURES Pursuant to the requirements of Section 13 of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. March 15, 2004 BRUSH ENGINEERED MATERIALS INC. <Table> /s/ GORDON D. HARNETT By: /s/ JOHN D. GRAMPA - ------------------------------------------- ------------------------------------------- Gordon D. Harnett John D. Grampa Chairman of the Board, President Vice President Finance and Chief Executive Officer and Chief Financial Officer </Table> Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. <Table> /s/ GORDON D. HARNETT* Chairman of the Board, President, March 15, 2004 - ------------------------------------------------ Chief Executive Officer and Director Gordon D. Harnett* (Principal Executive Officer) /s/ JOHN D. GRAMPA Vice President Finance and Chief Financial March 15, 2004 - ------------------------------------------------ Officer (Principal Financial and Accounting John D. Grampa Officer) /s/ ALBERT C. BERSTICKER* Director March 15, 2004 - ------------------------------------------------ Albert C. Bersticker /s/ DAVID H. HOAG* Director March 15, 2004 - ------------------------------------------------ David H. Hoag* /s/ JOSEPH P. KEITHLEY* Director March 15, 2004 - ------------------------------------------------ Joseph P. Keithley* /s/ WILLIAM B. LAWRENCE* Director March 15, 2004 - ------------------------------------------------ William B. Lawrence* /s/ WILLIAM P. MADAR* Director March 15, 2004 - ------------------------------------------------ William P. Madar* /s/ WILLIAM G. PRYOR* Director March 15, 2004 - ------------------------------------------------ William G. Pryor* /s/ N. MOHAN REDDY* Director March 15, 2004 - ------------------------------------------------ N. Mohan Reddy* /s/ WILLIAM R. ROBERTSON* Director March 15, 2004 - ------------------------------------------------ William R. Robertson* /s/ JOHN SHERWIN, JR.* Director March 15, 2004 - ------------------------------------------------ John Sherwin, Jr.* </Table>