Floyd E. Hayes, Ph.D., professor, is a zoologist specializing in the ecology, behavior and biogeography of birds. While an undergraduate student, Dr. Hayes took off a year to teach in an elementary school on the island of Kosrae in Micronesia. He worked for three years as a vertebrate biologist for the US Peace Corps, based in the National Museum of Natural History of Paraguay. He also taught biology for nine years at Caribbean Union College (now University of the Southern Caribbean) and the University of the West Indies in Trinidad and Tobago, and spent a year working as a wildlife biologist for the Division of Fish and Wildlife in St. Thomas, US Virgin Islands. Dr. Hayes was editor in chief of Journal of Caribbean Ornithology during 2005-2013 and was a Fulbright Scholar to Paraguay in 2012. He enjoys birding, rock climbing and snorkeling.

Bryan D. Ness, Ph.D., professor, has been at PUC since 1989. His research interests include plant systematics and genetics. He advises in the areas of biology, natural science, veterinary medicine, medical radiography and occupational therapy.

Kurt Sollanek has been an associate professor of biology at PUC since July 2025. He teaches introduction to human biology, human physiology, systems physiology, cellular and molecular biology, research methods, and also assists the kinesiology and health sciences department.

He previously worked at a large-scale medical device company as a regulatory affairs specialist, and before that, was an assistant professor in the kinesiology department at Sonoma State University. From Cheshire, Connecticut, Kurt graduated from Southern Connecticut State University with his B.S. in Exercise Science in 2008, and two years later earned his Master's in Exercise Science. In 2014, he received his Ph.D. in applied physiology and kinesiology from the University of Florida.

Kurt likes staying active by lifting weights, biking, and walking, and most importantly, spending time with his three kids and wife.

Dr. Backil Sung has been at PUC since 2012. He has degrees in medicine (M.D.), physiology (M.S.), and medical biotechnology (Ph.D). He has authored or co-authored 39 scientific papers in neuroscience, mainly in the area of pain mechanisms. He has also authored two book chapters, and frequently goes on medical mission trips. He teaches Neurobiology, Microbiology, Medical Microbiology and Biological Foundations.

Aimee C. Wyrick-Brownworth, MSc, is Dean of the School of Sciences and Professor of Biology at Pacific Union College in Angwin, Napa County, California. She earned her MSc in Organismal Biology and Ecology from the University of Montana, where she studied the effects of introduced trout on native amphibian populations. Since joining PUC in 2004, Aimee has worked on a wide range of restoration and research projects focused on introduced, invasive, and rare plant species in the Napa Valley. Most recently, she and her students have established monitoring plots in the PUC forest, investigated salamander ecology in the wildlands surrounding campus, and partnered with Boston University on an oak woodland restoration project in the Napa Valley. Aimee teaches undergraduate courses in general biology, conservation biology, plant taxonomy, and geology, and she serves as curator of the PUC Herbarium (PUA). She is an active member of the California Native Plant Society and the Land Trust of Napa County. In October 2020, Aimee and several co-PIs were awarded an NSF-PEN grant, which has supported the digitization of PUC herbarium specimens, including the college’s extensive collection of Napa County species. She enjoys good food, gardening, and traveling—especially when shared with her husband, Gregory.