The biggest obstacle women face in their professional lives is knowing how and when to advance their careers and when to speak up, says Niloufar Molavi, tax partner and U.S. chief diversity officer at PricewaterhouseCoopers. Here, she shares some of her secrets.

Chief diversity officers from American Express, KPMG, Ernst & Young and IBM lead real-world discussions of the best practices and greatest concerns on critical diversity-management areas.