John Gruber

John Gruber is a science teacher and researcher at Friends’ Central School, where he has worked since 1991.  He was an environmental analyst at Abt Associates in Cambridge, Massachusetts and a science teacher in rural Zimbabwe before coming to Friends’ Central’s science department. John attended Brown University and received his AB in Environmental Studies with a focus in biology, geology, and evolution. He earned a Master’s of Science in Medicinal Chemistry from the Philadelphia College of Pharmacy and Science. John is an active ecological and systematic biology researcher with particular interests in moths, bees, and fungus. 

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Upcoming Programs by John Gruber

The Turning Season — A Practice of Presence Among Trees

Also With Lloyd Guindon

October 18, 2026
A contemplative fall nature walk with John Gruber and Lloyd Guindon.