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Glenbrook North Leadership

The day-to-day operations of Glenbrook North High School are overseen and managed by the Principal and a group of highly-qualified school administrators.

School administrators are responsible for:

  • Leading and overseeing the operations of one or more functional areas of a school or District department
  • Directly supervising and evaluating personnel
  • Responsible for serving as a budget manager for a functional area 
  • Ensuring compliance with local, state, and federal laws

Glenbrook High School District 225 employs licensed administrators (individuals filling positions requiring licensure from the Illinois State Board of Education) and non-licensed administrators (filling positions that do not require licensure).  

Building Administrative Team

Jason Markey


Dr. Edward Solis

Associate Principal - Curriculum & Instruction

Lauren Bonner

Associate Principal - Administrative Services

John Catalano

Assistant Principal - Athletics

William Eike

Assistant Principal - Dean's Office

Eric Etherton

Assistant Principal - Student Services

Dr. Michael Tarjan

Assistant Principal - Student Activities

Instructional Supervisors

Chad Davidson

Instructional Supervisor - Fine Arts

Dr. John Finan

Instructional Supervisor - Summer School

Kathryn French

Instructional Supervisor - Special Education

Mary Kosirog

Instructional Supervisor - CTE

Josh Morrel

Instructional Supervisor - World Language

Robert Pieper

Instructional Supervisor - PE/HE/DE

Mary Rockrohr

Instructional Supervisor - Science

Dr. Anna Schultes

Instructional Supervisor - English

Maria Vasilopoulos

Instructional Supervisor - Mathematics

Scott Williams

Instructional Supervisor - Social Studies