When Don Brown signed on to become Michigan’s defensive coordinator, there was a ripple effect.

The opening left by Brown at Boston College made it one of the more coveted assistant jobs in the country. A chance to lead the unit that finished first in FBS in total defense made it an attractive opening.

Iowa’s Jim Reid deemed it the perfect opportunity.

On Thursday, Boston College announced that the Hawkeye linebackers coach accepted the position to become the program’s next defensive coordinator.

“First, I would like to thank Kirk Ferentz for the opportunity to work at Iowa; it was an honor to work with so many great players, fans and staff. I have great confidence in Steve Addazio’s leadership and the direction his program is headed,” Reid said in a release. “Boston College is a very special place; I know this because I worked there in 1994 around some dedicated, wonderful people in a very close-knit Jesuit community. BC develops great young people and is just a tremendous institution.”

RELATED: Michigan hires defensive coordinator of nation’s top unit

BC will get a coach that played a big part in Iowa’s historic 2015 season. The Hawkeyes were 22nd in the nation in total defense and 15th against the run. Iowa was actually the last FBS school to allow a rushing touchdown.

FootballScoop.com tabbed Reid as 2013 Linebackers Coach of the Year in college football.

Kirk Ferentz will have to replace a guy that was one of the key leaders behind Iowa’s consistent defensive prowess.

“Jim Reid has played a key role in our success in his three years on our staff, and we wish him continued success at Boston College,” Ferentz said in a release. “Jim is a tireless worker who builds strong relationships with his players and his fellow coaches.

“He has been a very valuable member of our staff and his contributions to the program go beyond the playing field.”