Sean Callahan


Sean has been teaching tree climbing for 6 years and is now based out of Columbus, Ohio, where he still teaches as a private instructor for Cornell Outdoor Education. He has worked as a climbing arborist and a forest health technician and researcher in New York and Northern Arizona. He has focused mainly on collecting new data on insect pests through canopy access but has also worked on cone collecting projects for gene conservation and regeneration studies along with epigenetic research to better predict species' reactions to changing temperatures.


Cornell's own David Katz worked on both sides of the lens to help Joe Pontecorvo with his recent episode of PBS Nature on Yosemite more

CTC in Madagascar

Jan 06, 2017

Cornell students travel to Madagascar to climb the iconic Baobab trees more

CTC collaborator Charlie Engelman launches a nature video series on National Geographic Kids. more