Associate Dean of Students

Mr. Sean Garrison

Mr. Garrison has been a part of the Glenbrook community for over 16 years and a member of the State of Illinois educational community for over 30 years.  Prior to serving as a Dean at GBS, Mr. Garrison was a science educator (Chemistry, Astronomy, Marine Biology, Geology) and a Science Department Chair.  Along with the role in the classroom, Mr. Garrison served as a basketball and baseball coach.  Mr. Garrison obtained his Master of Science from Eastern Illinois University along with a Master of Arts in Educational Administration, also, from EIU.  Mr. Garrison also completed his course work in a Doctorate in Educational Leadership, along with obtaining his Illinois Superintendent Licence, through Northern Illinois University.  However, Mr. Garrison's greatest role throughout his life has been the honor of serving as a dad to his kids, Jon and Julia!

Contact Information

Phone: 847-486-4451

Email: sgarrison@glenbrook225.org