The Dawson County Chamber of Commerce is preparing for a leadership transition after its top two officials announced plans to retire.Longtime president Linda Williams and husband Marty Williams, vice president of travel and tourism, said they will step down together July 6.“I have been blessed by my association with this organization and I have met and worked with so many wonderful people over the years,” Linda Williams said. “I couldn’t have written a better script for my life during these chamber years. It has truly been a blessing to serve this organization and each of you.”Hired in 1996 as the chamber’s information specialist, she was selected to lead the group as president in 1999, a time when Dawson County would soon experience great growth.Marty Williams has held his position since 2006.