About the Administrators:

Harper welcomes you as a partner in the education of your child. Please feel free to contact us anytime as our door (or email) is always open.

Aaron Dubnow, Principal

[email protected]


I am so thrilled to be starting my 4th year as Principal at Harper and helping all our students to be awesome Dolphins! The 2022-23 School Year is going to be amazing! I am excited to continue to help create a safe environment for our students to attend school every day. Our community is strong because we all work together and support each other, both in and outside of the Harper building. I look forward to working with the Harper community to help our Dolphins grow and thrive throughout the school year.

After graduating from New Trier High School, I attended the University of Illinois (Go Illini!) majoring in Education with a middle school endorsement. I earned my Master’s in Administration and Supervision from National Louis University.

I began in District 39 teaching a combination of science, math, and social studies to 8th graders at Wilmette Junior High School for 6 years. Outside the classroom, I have been the coach of the cross country and track and field teams, and a sponsor of the student council. From 2015-2019 I was the 5th Grade Level Administrator at Highcrest Middle School.

Outside of work, I enjoy spending time with my family, and friends, running, and going to sporting events - especially at Wrigley Field. I have 2 incredible daughters (ages 1 and 3), who keep my wife and I very busy, but we love it!

Jacqueline Brennan, Assistant Principal
[email protected]

I am thrilled to return to Harper for my second year as the Assistant Principal. Last year I worked to develop strong relationships with our Harper Dolphins and their families and I look forward to doing more of the same this year. Seeing our students and teachers together in the classroom learning, growing and thriving truly inspires me as a leader. I am eager to partner with our families, students and staff to ensure another year of learning, individual growth, success and happiness. Go Dolphins!

My educational career began in the classroom teaching in Chicago Public Schools and District 39 (at Central). As a teacher, my time was spent in 4th, 5th and 6th grade classrooms. I spent the last four years as an assistant principal at Scammon Elementary Schools, a PreK-8th grade building of over 650 students, in Chicago Public Schools.
I attended Loyola Academy in Wilmette for high school followed by the University of Illinois at Urbana-Champaign where I received my undergraduate degree in Elementary Education with middle school endorsements in English Language Arts and Social Science. I then attended Northeastern Illinois University where I received my Masters in Educational Leadership and Development.
On a personal note, I have 18 month identical twin daughters who love running in different directions. The girls keep my husband and I quite busy! During my free time, I enjoy time with our extended family in the form of barbeques, family dinners and all things food related. My husband and I live within one mile of both of our siblings and parents!

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