Top management’s support for the IS function impacts the success of SISP and is especially vital to information intensive firms. Use of information technology in the electric utility industry is noteworthy because of the transitioning of the electric utility industry into a deregulated, more competitive environment. A strong relationship is hypothesized between top management support for SISP and the strategic use of IS. The relationship is expected to be stronger among electrics. A survey of CIOs and other members of top management from 161 companies, including 21 responses from electric utilities, reveals that top management’s support of SISP does influence the use of IS for competitive advantage and supports study hypotheses.