Dennis J. Simon, Ph.D., is a licensed clinical and school psychologist with over three decades of experience supervising interns, professionals, and psychological services. For 14 years, he was the Director of NSSEO Timber Ridge Therapeutic Day School, a zero-reject public school program serving the Chicago area. His career has centered on program development and psychological interventions for children and adolescents experiencing social, emotional, and behavioral disorders. He has written extensively about the adaptation of evidence-based strategies to school-centered intereventions. He has been a Lecturer in School Psychology, Clinical Psychology, and Teacher Education Programs at Loyola University of Chicago, USA.

Mark E. Swerdlik, Ph.D., ABPP, NCSP, is a Professor Emeritus and Past Coordinator of the Specialist and Doctoral Programs in School Psychology, University Supervisor of Internship Training, and Clinical Supervisor in the Psychological Services Center at Illinois State University, USA, where he was a university educator for more than four decades. He is Past Co-Chair of the NASP Graduate Education Committee and the Council of Directors of School Psychology Programs, and has been a leader in program initiatives for training intern and practicum supervisors in Illinois and nationally. Dr. Swerdlik is a licensed clinical and school psychologist.

Drs. Simon and Swerdlik, joined by collaborating author Dr. Tracy Cruise, created and coordinate the Illinois School Psychologists Association's Supervisor Credential Program, a model program for professional development for school psychology supervisors based on the DEP Supervision Model for School Psychology.