['07 rank – Not ranked]
Christine Castro is living proof that a good communicator can take on any challenge. While some communications pros remain within their comfort zone – hopping from one competitor to another in the same industry – Castro has worked for such disparate companies as Disney, Yahoo, Bank of America, and, her current employer, Genentech. Castro runs the communications function, which oversees corporate and product PR, advocacy relations, and internal communications. She is also on the board of directors at the Genentech Foundation, the company's nonprofit. Castro was chief communications officer and SVP at Yahoo from 2002 to 2007, and SVP of communications at Bank of America before joining Genentech.