Potomac School Leadership

John Kowalik

Head of School

Dyana Conroy


Tim Jaeger

Assistant Head of School

Annabelle Dunn

Interim Director of Teaching & Learning

Nancy Powell

Head of the Lower School

John Mathews

Head of the Intermediate and Middle School

Doug McLane

Head of the Upper School

Barbara Overstreet

Director of Advancement

Carson Roy

Director of Admission & Financial Aid 


Cas Blanchard

Cas Blanchard 

Director of Girls Athletics 


Rob Lee

Director of Boys Athletics 

David Grant

David Grant

Director of Diversity & Inclusion

Mimsy Stirn

Director of Auxiliary Services 


Sean Moran

Director of Technology & Innovation