In February 2015, Lyght was hired by the University of Notre Dame to replace Kerry Cooks as defensive backs coach. In January of 2021 Notre Dame football was placed on probation for one year over recruiting violations due to Lyght having impermissible contact with a player at his high school and also sending 10 impermissible text messages to a 2021 recruit before it was allowed under NCAA rules. It was also announced that he was fired from his coaching position at Notre Dame in January of 2020.