Derby's mayor filed Thursday to run for the District 5 seat held by Gwen Welshimer on the Sedgwick County commission.
Dion Avello, a Republican who has been mayor for about six years, said he's ready for a new challenge.
"We've grown Derby to a place where it's a nice place to live and shop and all that," he said. "I believe that we need to continue to build the county in the same vein with high-tech industry."
Avello, 69, said he wants to see the county go after cutting-edge industries such as wind energy. "I know we can go get them," he said. "We've got to get out of this recession."
The general election is Nov. 2, 2010. District 5 covers southeast Sedgwick County.