It’s been a long time coming, but Ben Johnson (Chicago Bears) and Aaron Glenn (New York Jets) are off to run their own franchises. Who they take with them is the next question, but what we do know right now is that Dan Campbell is tasked with replacing two of his closest confidants in the middle of a Super Bowl window.

With Aaron Glenn off to the Jets, here are five names to watch as the Lions search for their next defensive coordinator.

The Detroit Lions have already lost two key assistant coaches during the 2025 offseason, and more are expected to leave. Here's a look at the full list of Lions assistant coaches who have left or could leave the team,

Aaron Glenn, Detroit Lions defensive coordinator, has been hired by the new York Jets as their next head coach.

Terrell Williams spent six seasons working with new Patriots coach Mike Vrabel before coming to Detroit last winter.

Former Pittsburgh Steelers linebacker Larry Foote is a candidate for the Detroit Lions defensive coordinator vacancy, according to a report

Terrell Williams spent six seasons working with new Patriots coach Mike Vrabel before coming to Detroit last winter.

The Detroit Lions acquired Alabama cornerback Terrion Arnold with the 24th pick in the NFL Draft on April 25 and put him to work.

The Lions are heading into the offseason sooner than they or most anyone expected. We’ll kick-start the process by evaluating five questions facing the team.

Glenn and Campbell came over together from the Saints. The defensive coordinator left his mark in Detroit as a culture builder who worked through a ton of adversity.

Aaron Glenn, the Detroit Lions ’ defensive coordinator since 2021, has agreed to become the next head coach of the New York Jets, according to reports. He returns to the organization where he played the first eight seasons of his NFL career.

Saleh was previously the 49ers defensive coordinator from 2017–20 until taking the head coaching job with the New York Jets.