After graduating from the Macaulay Honors College at Hunter College with a B.A. in Chemistry, Sheehan has remained in CUNY to earn a Ph.D. in Chemistry. As an undergraduate, he worked on designing a system using di-phenylalanine gels to trap small molecules in solution. Currently, he is involved in the structural analysis of short-peptide supramolecular structures using Cryo-TEM.
Analyzing peptide-based nano-systems