Current role: Managing Director and Head of Value Creation, Silver Lake Partners
A number of current and former Cisco executives have been anointed Chambers' "heir apparent" over the years, but many Cisco observers thought it was former EVP and Chief Development Officer Charles Giancarlo's job to lose.
That was until Giancarlo himself up and left Cisco in December 2007, convinced, according to insiders, that he wouldn't help himself waiting around for Chambers to step aside. A lot's changed at Cisco in the five years hence, but would Giancarlo consider a return? And if he were invited, would he feel crowded by the idea of Chambers remaining as board chairman?