[1] In 2017, Kasper coached at John Carroll University.
[2] Kasper originally joined the Philadelphia Eagles as a defensive quality control coach during the 2021 offseason after spending the previous three years (2018–20) at Duke University.
[3][4][5] After the Eagle's loss in Super Bowl LVII, the Dolphins hired Kasper as their new safeties coach, replacing Steve Gregory who was let go at the end of the season.
[6][1] In February 2024, Kasper came to terms with the Philadelphia Eagles to return as their safeties coach.
[7] Kasper was part of the coaching staff that won Super Bowl LIX over the Kansas City Chiefs.