About District 225 > Administration
Mrs. Hillarie Siena
Hillarie Siena is currently serving Glenbrook High School District 225 as assistant superintendent for business affairs. Mrs. Siena has been a member of the Glenbrook business office team since 1997, most recently serving as director of business affairs. Prior to coming to Glenbrooks, she served for thirteen years as a public accountant. Mrs. Siena earned her Education Specialist in Educational Administration and her Master of Science in School Business Management degrees from Northern Illinois University, and has completed her doctoral coursework in Educational Administration at NIU. She is a graduate of Roosevelt University with a Bachelor of Science in Accounting. Mrs. Siena is a member of several professional organizations and currently sits on the Board of Directors for the Illinois Association of School Business Officials.