Altoona’s first full-time fire chief was just sworn in Wednesday morning, and the city’s police chief already has a nickname for the two emergency services leaders. “I already refer to us as the dynamic duo,” police Chief Jesse James said after Mark Renderman officially began his duties as fire chief. “I’m excited about what we will be able to do as a team to continue to move forward for the city of Altoona.” Renderman, 43, has served as chief of the Owen-Withee-Curtiss Fire District since 2012.