Dr. Mattson trained at the University of Pennsylvania School of Dentistry. After his training in Pennsylvania, he eventually moved to Maryland and established a practice in Olney in 1992.
In addition to developing deep roots in the Olney area, he served as Associate Clinical Professor of Orthodontics at the University of Maryland School of Dentistry. In that role, he met Dr. Shlash in 2009 when she was an orthodontic resident. Since then, they have remained close colleagues and he asked her to join the practice a decade later.
Dr. Mattson officially retired in July 2021. He is a friend, mentor, and leader in the Olney community and his legacy continues at Shlash Orthodontics.