Tulsa Fire Chief Ray Driskell retired Thursday.
Driskell, 56, has been with the department for 35 years. Former Mayor Dewey Bartlett made his fire chief in May 2012.
Prior becoming chief, Driskell was as a fire marshal, assistant chief, district chief and chief of finance and deputy chief.
Bynum has named Deputy Chief Scott Clark as interim chief until a new chief is selected.