following his retirement from playing professionally, radwanski assisted his alma mater's soccer program as an assistant coach in 1998 while also working in the carolina dynamo’s front office. in 1998 and 1999, he served as the director of coaching for the greensboro twisters youth club. he moved to the ranks of professional coaching in 1999, he coached the piedmont spark of the second division women's w-2 league. that year, radwanski coached the club to the best record in the w-2 before falling to the hampton roads piranhas in the first round of the playoffs. on february 15, 2001, he replaced jack poland as the head coach of the uncg women's soccer head coach. in 2006, he was named the southern conference coach of the year in 2006. radwanski has continued his involvement in youth soccer with the twisters and the jamestown soccer club in addition to his duties as a college soccer coach. in 2011, radwanski replaced hershey strosberg as coach of the clemson tigers women's soccer team. on august 15, 2014, radwanski was named in a lawsuit by haley ellen hunt related to an alleged hazing incident on august 18, 2011. in 2016, radwanski was named acc coach of the year after leading clemson to a 13–3–3 regular season record. in 2017, radwanski won his 200th career game as a coach in a match against siu edwardsville.