DeWitt is a Professor in the department of Art and Art History at Colgate University. He did his undergraduate work at Yale University, was a member of the inaugural group of CORE Fellows at the MFA Houston and received his MFA from Edinburgh College of Art, Edinburgh, Scotland. He is the recipient of numerous grants and fellowships, and his work is in the collections of many museums and institutions across the nation. He is currently working on a commission for Syracuse University and the City of Syracuse and a project for the University of Tennessee at Knoxville.