Dan Campbell is bringing at least one coach with him from New Orleans to Detroit.
The Lions' head coach to be is hiring Saints' secondary coach Aaron Glenn as his defensive coordinator, according to the NFL Network.
Glenn, a three-time Pro Bowl corner during his 15-year playing career, has been the defensive backs coach in New Orleans since 2016 -- the same year Campbell joined the team as assistant head coach and tight ends coach.
He also served as a defensive backs coach for the Browns from 2014-15, and spent two years as a scout for the Jets before that.
With Glenn in charge of the secondary, the Saints finished fifth in the NFL in passing defense this year and first with 18 interceptions. They held opposing quarterbacks to a passer rating of 83.3, the fourth lowest mark in the league.
The Lions had the second fewest interceptions in the NFL (7) and surrendered an NFL-worst passer rating of 112.4. Their defense finished last overall, while giving up the most yards and the most points in franchise history.
Time for Glenn to get to work.