After 44 years in city government, Chief Administrative Officer William Summers IV will retire.Summers was most widely known for serving as deputy to former Mayor Jerry Abramson from 1985 to 1999 and again from 2003 to 2010. New Mayor Greg Fischer asked Summers to stay on staff to guide the transition. Summers oversaw police, fire, EMS and public works.Summers will step down on March 1st and move to the Bi-State Bridges Authority. He will fill the seat vacated by former GLI head Joe Reagan.Interim Police Chief Ishmon Burks will replace Summers in the Fischer administration.