Scout.com was first among several media outlets to report that Durkin would be joining Jim Harbaugh's new staff.
The university has yet to confirm Durkin's hire.
Durkin comes to Michigan after serving a short stint as Florida's interim head coach this bowl season. He led the Gators to a 28-20 win in the Birmingham Bowl on Saturday. He reportedly passed on other job offers in December while waiting to see what would happen at Michigan.
Harbaugh and Durkin first crossed paths at Stanford. Durkin left Bowling Green, his alma mater, in 2007 to join Harbaugh's first Cardinal staff in 2007. He left Stanford after three seasons to go to Florida and reunite with Urban Meyer, his former boss at Bowling Green.
At Florida, Durkin coached linebackers and special teams before he was promoted to defensive coordinator two years ago. His defenses allowed 21.1 points per game in 2013 and 2014, finishing in the top 20 nationally in both years. He served as the team's interim head coach when Will Muschamp resigned in November.
Durkin takes the coordinator position that previously belonged to Greg Mattison at Michigan. Mattison remains on the recruiting trail for the Wolverines and is expected to be on Harbaugh's staff in some capacity. He and Durkin previously worked together at Notre Dame in 2003 and 2004.