Callen is a co-founder and board member of The Wet Lab, and organizes our hands-on biotech workshops. She is also the Lead researcher on the La Jolla Cove Microbial Diversity Project, and hopes to encourage the public to make scientific discovery a part of everyday life. Callen has a PhD in Molecular and Cellular Biology, from Yale University, where she studied the biomechanics of neuronal regeneration. As a post-doctoral fellow at University of Californica, San Diego, she studied Hydra regeneration. She currently works as a life science consultant.