(Reuters) -Oracle named insiders Clay Magouyrk and Mike Sicilia as co-CEOs on Monday, replacing Safra Catz, who was at the helm of the cloud services provider for 11 years. Catz will remain with the company as vice chair of the board. Here are five things to know about Oracle's new chiefs Magouyrk and Sicilia: Clay Magouyrk * Magouyrk, 39, holds a Bachelor of Science degree inelectrical engineering from the University of Memphis. His earlyprofessional experience includes engineering roles at HiltonHote ...