Bill Callahan will serve as the Redskins' head coach, team president Bruce Allen announced in a press conference Monday.

Callahan, who has been the Redskins' assistant head coach since 2017 and the offensive line coach since 2015, replaces former head coach Jay Gruden, who was relieved of his duties Monday morning.

Callahan has more than two decades of NFL coaching experience. He began his career as the offensive line coach with the Philadelphia Eagles in 1995 and has worked for five franchises overall. He's been an offensive coordinator twice -- for the Oakland Raiders from 1998 to 2001 and for the Dallas Cowboys from 2012 to 2014 -- and served as the Raiders' head coach during the 2002 and 2003 seasons.

In 2015, the Redskins hired Callahan away from the Cowboys to become the offensive line coach in Washington. He was promoted to assistant head coach two years later.