Dr. Morris is a Board of Trustees Distinguished Professor at the University of Connecticut. He has been on the faculty of the Toxicology Program for 32 years and served as the director of the program from 2000–2010. He served as the head of the Pharmaceutical Sciences Department (2002–2010), assistant dean for research (2008–2013) and is currently completing his term as interim dean of the School of Pharmacy at the University. He maintains active research interests in inhalation toxicology and quantitative inhalation risk assessment and has authored approximately 90 papers and book chapters in the field. His research publications have received many awards including Faculty of 1000 recognition for being among the top 2% of publications in biomedical literature for his work on the counter-irritant effects of menthol in cigarette smoke. He served on the editorial boards of Fundamental and Applied Toxicology, Toxicological Sciences, and Inhalation Toxicology and on the TOX-2 and ALTOX-4 Study Sections for NIH. He has served on air pollutant health assessment review panels for the states of Connecticut, Vermont, and Virginia, as well as for the US Environmental Protection Agency, Centers for Disease Control Agency for Toxic Substances and Disease Registry, and the Department of Energy Office of Health and Environmental Research. He currently serves on two National Academy of Sciences panels. He is a Fellow of the Academy of Toxicological Sciences.

He has served on air pollutant health assessment review panels for the states of Connecticut, Vermont, and Virginia, as well as for the US Environmental Protection Agency, Centers for Disease Control Agency for Toxic Substances and Disease Registry, and the Department of Energy Office of Health and Environmental Research.