|The Big Bang Theory Staff|
|Birthday||January 17, 1966|
|First Episode||The Benefactor Factor|
|All of the Big Bang Theory Staff|
Joshua Charles Malina (born January 17, 1966) is an and , perhaps most famous for portraying Deputy Communications Director Will Bailey on the NBC drama series '.
He appears as Dr. Siebert, the newly-appointed president of the California Institute of Technology, in the episode "The Benefactor Factor" and is constantly irritated by Dr. Sheldon Cooper. His character has been referred to several times when Sheldon is bothering him at all hours about something he considers minor or irritating.
Several references have been made that he swears a lot "if the university needs money then maybe you should start a swear jar" and "do you kiss your mother with that mouth" suggesting a lot of swearing.