William Waddill is stepping down as senior vice president and CFO of Calithera BioSciences Inc. on Dec. 31.

Waddill is also the treasurer and secretary of the company and is stepping down due to his relocation outside Northern California.

Susan Molineaux will become the company's principal financial officer following the departure, with Stephanie Wong acting as principal accounting officer.

Meanwhile, Curtis Hecht was promoted to senior vice president of business and corporate development while Jennifer McNealey was named vice president of investor relations and strategy.