Before Tibesar's lone season at Purdue, he worked under new Bears head coach Marc Trestman with the CFL's Montreal Alouettes. Tibesar coached the Alouettes' linebackers in 2009 and '10 before being promoted to defensive coordinator in '11. Tibesar also spent time at Kansas State, where he served as the Wildcats' special-teams coach (2006) and defensive coordinator (2007-08).
Tibesar inherits a linebackers unit that has just one starter from last season under contract for next year: weakside linebacker Lance Briggs. Middle linebacker Brian Urlacher and strongside linebacker Nick Roach are both scheduled to be unrestricted free agents, as is top reserve Geno Hayes, who signed a one-year deal with the club last offseason.
Tibesar replaces former Bears linebackers coach Bob Babich, who departed after nine years to become the defensive coordinator of the Jacksonville Jaguars.