After a year leading one of the most dominant secondaries in the country, Greg Jackson is reportedly leaving Michigan.

Fox Sports and ESPN both reported that the Michigan secondary coach is set to become the new safeties coach of the Dallas Cowboys.

Michigan returns one of the top secondaries in the country, led by All-American Jourdan Lewis and freshman sensation Jabrill Peppers. The Wolverines also signed four-star defensive backs David Long and Lavert Hill.

Jackson was on Jim Harbaugh’s staff with the San Francisco 49ers from 2011-14. The 49-year-old coach also spent time at Wisconsin as the team’s nickel and assistant linebackers coach.

It marks another change for a staff that has shifted plenty since the end of Harbaugh’s first regular season in Ann Arbor. Defensive coordinator D.J. Durkin left to take the head job at Maryland while special teams coordinator John Baxter went to USC.