The state is moving ahead with a plan to cut energy costs by enlisting energy service companies that can design and oversee implementation of such programs.

This week, the State Procurement Office released a list of six pre-qualified companies that can be considered for such work. The list includes Chevron U.S.A., Amereso/Pacific Energy Joint Venture, Honeywell International, Johnson Controls, Noresco LLC and Trane Inc.

Earlier this year, the state Department of Accounting and General Services put out a call for companies to submit proposals for energy-saving work in 108 of the largest state buildings. The plan is in line with Gov. Linda Lingle's efforts to reduce the state's dependence on imported oil.

The effort also comes at a time when the state is looking to reduce costs because tax revenue gains have been less than projected with the slowdown in Hawai'i's economy. Hawai'i's electricity costs are the highest in the nation.

The department called for energy service companies, or ESCOs, to apply and become pre-qualified for the work that can include installation of more efficient lighting, air conditioning systems, photovoltaic panels and tinted windows. The ESCO's concentrate on such work and can line up financing for such projects.

Chevron said its Chevron Energy Solutions unit is opening an office here and will seek some of the state work.

"It opens up the market," said Bruce Dickinson, director of business development for Chevron Energy Solutions. He said the firm also is pursuing work from counties and the private sector. He said such projects can reduce energy costs by 25 percent to 30 percent in some instances.

Chevron has hired Brian Kealoha as regional manager and envisions the local office may grow to eight to 10 people.