Sue Spradley, head of north America region, Nokia Siemens Networks

Formerly the president of Nortel’s Global Services and Operations, where she led the Canadian firm’s engineering, manufacturing and supply chain management, Sue Spradley joined Nokia Siemens Networks in July 2007 as the firm’s head of North America. The move was a return to the fold of sorts as, prior to joining Nortel, Spradley had served as vice president of marketing and product development for Siemens Communications’ North American business.

Spradley has a bachelor’s degree in computer science from the University of Kansas and has completed the Advanced Management Program at Harvard University Business School and the Executive Management Program at London Business School. She has also served on the US National Security Telecommunications Advisory Committee.