The Cajuns hired former Texas Tech defensive coordinator Matt Wallerstedt as a consultant, the school confirmed Wedensday.
Sports Illustrated first reported the hiring.
Wallerstedt abruptly resigned from his post at Texas Tech three games into this season. His defense was allowing 36.7 points per game, but his resignation was not related to the team's struggles defensively.
The Red Raiders issued a statement after Wallerstedt's resignation, saying it was for "personal reasons."
"I have submitted my resignation to (Texas Tech coach Kliff) Kingsbury effective immediately because I want the best for the Red Raider program, and this will allow them to go in a different direction on defense," Wallerstedt said in the statement.
According to the Sports Illustrated report, Cajuns coach Mark Hudspeth reached out to Wallerstedt shortly after he left the Texas Tech program.
Wallerstedt served as Hudspeth’s defensive coordinator at North Alabama in 2003.
The Cajuns have struggled defensively this season, allowing 35 points and 458 yards per game.