Mark Milligan learned to tune and repair pianos through the program with American School of Piano Tuning. He completed the course in 2001 while studying Music Education at Eastern Illinois University. Since his certification, he has continued to learn from various resources such as fellow technicians, books, clinics, etc. He has also been involved in Piano Technicians' Guild. It was through the PTG that he earned the status of RPT (Registered Piano Technician) after being tested on repairs, tuning, and action regulation.