Skip To Main Content

Mobile Nav Container


Radnor High School is led by a team of administrators that features a building principal, an associate principal, two assistant principals, and an athletic director.

Learn more about the RHS administrative team (listed alphabetically) below.

Michael Friel

Athletic Director

Mr. Friel is in his twelfth year as the Athletic Director at Radnor High School. He came to Radnor from Ridley High School where he spent ten years as a member of the school's English Department. Prior to coming to Radnor, Mr. Friel spent ten years as a member of Ridley's football staff and was the Head Lacrosse Coach at Springfield High School. His main responsibilities include overseeing the high school athletics programs, as well as coordinating all facility uses at the high school.

Dr. Judy Lee

Associate Principal

As Associate Principal, Dr. Lee will report to the principal, and she will provide support on all aspects of our high school programming with an emphasis on Teaching and Learning.

Prior to joining Radnor, Dr. Lee was the Principal of Penn Wood High School in Lansdowne, where she led several initiatives on curriculum development, scheduling, professional development, and post-secondary pathways. Prior to working at Penn Wood, Dr. Lee taught High School Mathematics in Philadelphia and was honored as a Lindback Educator of the Year Award for demonstrating excellence in promoting learning at the highest levels.  She began her career as a middle school math teacher in Seoul, Korea; and in 2009 she earned her Doctor of Education from Temple University.  

Dr. Joseph MacNamara


Dr. MacNamara is the Principal of Radnor High School. Prior to principal, he served as an Assistant Principal of RHS from 2020-23. Dr. MacNamara joined RTSD in 2020 from Coatesville Area School District, where he served as Assistant Principal of Coatesville Area Intermediate High School since 2013. In this role, he was responsible for student discipline; served as Local Education Agency (LEA) representative to students receiving special education and gifted services; observed and evaluated teachers in multiple content areas including guidance and support staff; monitored and reported progress on the ATSI plan; developed the master schedule; managed the budget for Math, Music and Family Consumer Science Departments; and updated emergency procedure plan and operations annually. He also served as Safe Schools Program administrator, organizer and lead on the Equity Team, participant on the Student Assistance Program (SAP) team and mentor to new administrators.

Silvia Manoukian

Assistant Principal

Ms. Manoukian joined RTSD in 2022 from Lower Merion School District where she served in a variety of roles since 2015. Beyond being the Math Specialist at Harriton High School, Ms. Manoukian served as Department Co-Chair on the LMSD Diversity, Equity and Inclusivity Committee and was member of the LMSD Committee Addressing Race and Education. She also served as school culture/leadership team head of the New Building 5-8 Middle School Committee, the Harriton High School Data Team, and the Harriton High School Achievement Team.

As the Assistant Principal of Radnor High School, she serves students, staff, and community members through overseeing numerous departments and teams to continue to ensure that our rich tradition of academic and co-curricular excellence is nurtured and supported. She is humbled and proud to work with our extraordinary team of dedicated teachers and staff whose daily efforts provide a fulfilling, challenging, and individualized educational experience for each student.

Ms. Manoukian holds her undergraduate degree from University of California, Irvine. She earned her Master’s in Education and her Secondary Teaching Credentials in Mathematics from Stanford University, and her Principalship Certification from Cabrini University. While she loves attending Radnor High School events, in her other spare time, she enjoys being active, traveling, and spending as much time as possible with her three children when they return home from college and their jobs! Go Raptors!

Gabriel Presley

Assistant Principal

Mr. Presley joins RTSD from the School District of Philadelphia where he served as the Assistant Principal of Thomas Alva Edison High School overseeing the administration of school programs and the implementation of policies, assisting in staff development, resource management, and instructional program development among other responsibilities.  

Beyond the classroom, Mr. Presley serves on the Lindback Award Teacher Selection Committee and is a mentor in the Penn Mentorship in Preparing Teachers program at the University of Pennsylvania. He has also served as a head swim coach for 15 years in Philadelphia. Mr. Presley is a 2021 Lindback Foundations Award for Distinguished Teachers winner.  

Mr. Presley earned a Bachelor of Arts in Psychology with a minor in Biology from La Salle University; a Master of Education from Eastern University; and a Master of Science in Education and Principal Certification from the University of Pennsylvania.