David Hartzell has been named president and CEO of Mack Defense LLC. The hiring was effective Jan. 1.
Hartzell joined Mack Defense as director of Engineering in 2015 and became senior director of product development, Purchasing and Projects, in 2017. He first joined Mack Trucks as a staff engineer in 1988. He was chief engineer for electrical and electronic engineering beginning in 1998 before becoming director of Product Planning in 2003 and director of Product Development in 2005.
Mack Defense, Allentown, Pa., is a wholly-owned subsidiary of Mack Trucks, responsible for the sale of heavy duty trucks to federal- and ministerial-level customers globally.