Mark Gregston is co-founder (with his wife, Jan) and Executive Director of Heartlight, a residential counseling center for teens in crisis located in Hallsvilee, Texas. Heartlight has become one of the country's finest residential counseling centers for teens, and known throughout North America as the “place to be” if your teen is struggling and hope is diminishing.

Mark is also the host of Heartlight Radio's weekend program, and heard on hundreds of stations with their daily program, Parenting Today's Teens. He has authored 12 books, written hundreds of articles about parenting teens in a difficult culture, and is also the host of the nationally-acclaimed read program, Parenting Today's Teens, which was honored to receive the 2014 Program of the Year award from the NRB. From his 40+ years of experience of working with teens and their families, Mark shares his insight and wisdom through seminars, retreats, and conferences, taking up all his free weekends. Mark and Jan have two grown children.