Sitek has held positions of increasing responsibility in purchasing, manufacturing and quality at GM and was named one of the “100 Leading Women in the North American Auto Industry” by Automotive News in 2010 and 2015. She is currently responsible for operations of GCCX and OnStar, with a focus on driving revenue and consistency in all operational units globally. Sitek’s previous roles at GM were in North America Manufacturing and Global Manufacturing Engineering. Prior to those responsibilities, Sitek was executive director of Global Purchasing and Supply Chain for Indirect, Machinery & Equipment where she also led Supplier Diversity initiatives at GM.