1 EXHIBIT 23.8 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS We hereby consent to the incorporation of our report, dated April 23, 1999, on the financial statements of Tesla Power and Automation, Inc. by reference into Integrated Electrical Services, Inc.'s Amendment No. 1 to Form S-4 (File No. 333-75139). BROCKMANN, ARMOUR & CO. LLC Denver, Colorado May 5, 1999