School Professionals


Michael J. Sullivan

Yellowstone Academy

Mike joined the YBGR team in August of 2011 as the Director of Education/Superintendent. His credentials include a teaching degree in special education from Montana State University-Billings, a Masters degree in Educational Technologies from Lesley University and a Masters degree in Educational Administration from Montana State University. Mike began his career in education as a teacher at Will James Middle School where he taught special education and social studies. He then moved to Lockwood Middle School where he was the Principal for 13 years. His responsibilities at YBGR include oversight of Yellowstone Academy-Residential, Yellowstone Academy-Day School and the educational program at Billings Clinic YPHP.



Keith Tresch

Yellowstone Academy

Keith Tresch joined the Yellowstone Academy team in 2012 as the Principal. His credentials include an Elementary and SPED degree from Montana State University-Billings and a Masters degree in School Administration from Montana State University.

He taught at Lockwood Schools for 12 years and in that time was deployed to Iraq for 2 tours as a member of the Montana Army National Guard.



Dwight Von Schriltz

School Psychologist/Director of Special Education
Yellowstone Academy

Dwight Von Schriltz has served as the School Psychologist and Director of Special Services at Yellowstone Academy (YA) since 2012. After earning his B.A. in Psychology and Communications from Concordia College, he went on to receive his M.S. degree in School Psychology from Moorhead State University. Dwight spent 16 years in the public school system before coming to YA and his passion for promoting awareness of mental health issues in children during that time was a key factor in his recognition as the 2006 Montana School Psychologist of the Year.