He is also an Associate Researcher at P. Universidad Catolica de Chile and an adjunct professor at Universidad Austral de Chile. Dr. Hayes’ dissertation research with Dr. Nancy Solomon at Miami University (Ohio) focused on the reproductive benefits of alloparental care and mechanisms of parental and alloparental care of offspring by female prairie voles (Microtus ochrogaster). His current research program focuses on the evolutionary significance of rodent sociality and mating systems. He is also participating in a National Evolutionary Synthesis Center project aimed at determining how neural and physiological mechanisms influence animal sociality and cooperative behavior.