From 1993 to 1994 , he was Head of Theoretical Physics at the SSC Laboratory before its termination .
In 1975 , Bardeen joined the staff of Fermi National Accelerator Laboratory where he has served as Head of the Theoretical Physics Department .
From 1993 to 1994 , Bardeen was Head of Theoretical Physics at the SSC Laboratory before its termination .
In 1975 , Bardeen joined the staff of Fermi National Accelerator Laboratory where he has served as Head of the Theoretical Physics Department .