Board of Directors


Michele "MiMi" Bernal-Graves, MS, Treasurer

MiMi is a Professional Development Coordinator with Kaiser Permanente. In this role, she coordinates inpatient job shadows, supports regional classes, and leads hospital orientation for new employees. She is a certified Professional in Human Resources (PHR) and holds a Bachelor of Science in Environmental Science with an emphasis in Biology from Pacific University and a Master’s of Science in Educational Leadership and Policy from Portland State University. MiMi currently serves on Oregon PSR’s Board as Treasurer.


David_Chatfield.jpgDavid Chatfield

David moved to Portland after working in the environmental and social justice movements for most of his life, including working closely with PSR Los Angeles in California. From 1997 to 2011, he was the Executive Director of Californians for Pesticide Reform (CPR), an advocacy coalition fighting for reduced use of pesticides and improved pesticides regulation. Before that, he worked for Greenpeace as Regional Director and International Pesticide Coordinator, and he chaired the board of Greenpeace Fund, the national organization’s tax-deductible arm, until 2012. David was International Director of Friends of the Earth, a founding board member of Pesticide Action Network, and on staff of the American Friends Service Committee.


Andy_Harris.jpgAndy Harris, MD

Andy is the Founder and Director of Professionals’ Training in Global Health at OHSU’s Global Health Center. He is a board certified ophthalmologist, a Clinical Assistant Professor at Casey Eye Institute, and a Clinical Correspondent for the American Academy of Ophthalmology. He is a graduate of Yale University and the University of Virginia Medical School. He has worked on medical missions and taught in Labrador, Mexico, Sri Lanka, Moldova, China, India, Ethiopia, and Sierra Leone. Andy served on the PSR National Board of Directors for 13 years and as National President in 1998.


Chris_Lowe.jpgChris Lowe, PhD

Raised outside of Boston, Chris came to Oregon to study at Reed College in 1977, graduated in 1982, and obtained a PhD in African History at Yale University. In 1991, he returned to Portland as a visiting professor at Reed and later studied epidemiology and biostatistics at OHSU in the MPH Program, partly due to his experiences researching in Swaziland, which has the world’s highest HIV prevalence. Chris's focus at OHSU was on environmental and social epidemiology, and he has taught at Reed, Clark College, WSU Vancouver, Linfield College, and Portland State. Chris currently works with Portland Jobs with Justice and serves as Vice President for the statewide Health Care for All (Oregon) coalition, advocating for universal publicly funded "single payer" health care.


Elaine_McKenzie.jpgElaine McKenzie, RN, MPH, Vice-President

Elaine is a public health nurse who lived and worked in Alaska for almost 30 years before moving to Portland in 2005. She worked in Alaska as an expert direct service PHN, Fairbanks Health Center Manager, Interior Regional Manager, and as Deputy Chief for the State of Alaska public health nursing system. After retiring from the State of Alaska, she studied for a PhD in Nursing at the University of San Diego and taught part-time at the University of Portland School of Nursing. Studying the consequences of collective violence and war on humans and the environment and using a public health framework for prevention became a particular focus during her PhD studies. Elaine currently leads Oregon PSR’s Peace Working Group and our Membership Committee.


Patricia Murphy, ND, LAc, Secretary

Originally from New England, Pat received a BS in Psychology from the University of Massachusetts at Amherst, MA, an ND from the National College of Naturopathic Medicine in Portland, OR, and is a graduate of the Oregon College of Oriental Medicine in Portland. For several years, Pat was an instructor at the Oregon College of Oriental Medicine and currently presents guest lectures about environmental medicine to acupuncture students at the masters and doctoral levels, to practitioners, and to the public. Since 1984 she has created a blended private practice of acupuncture and naturopathic medicine. Pat takes to heart the naturopathic tenet “prevention is the best cure, ” and she is dedicated to helping people learn about how to decrease toxic exposures. She has been a member of the Oregon PSR Environmental Health Work Group since 2007.

Nicki Nabavizadeh, MD (photo and bio coming soon)



Joel_Nigg.jpgJoel Nigg, PhD

Joel is a research and clinical psychologist in the Departments of Psychiatry and Behavioral Neuroscience at Oregon Health & Science University. He specializes in understanding the roots of common neurodevelopmental conditions in children, particularly attention deficits and hyperactivity and impulsivity. His interests in the role of toxic chemicals and other environmental influences on children’s brain/behavior development overlaps with priorities of Oregon PSR. In addition, he has been active for two decades in efforts to address climate change through community and volunteer efforts.


Pat_OHerron.jpgPatrick O'Herron, MD, Board President

Pat attended the University of Arizona College of Medicine at Tempe and completed his residency training at Oregon Health Sciences University in Neurology. He practiced general surgery for one year in McMinnville prior to joining the Trauma and Acute Care Surgery service at Salem Health, where he is now a general surgeon practicing acute care surgery. His focus at Oregon PSR is climate change, which fits well with our mission of addressing the greatest threats to human health. Pat has served as Oregon PSR's Board President since 2015, and he currently lives with his family in Portland.


John_Pearson.jpgJohn Pearson, MD

John is a retired pediatrician specializing in Pediatric Neurology. He retired in 2000 after being Chief of Pediatrics for Kaiser Permanente in Portland for the previous ten years. He is currently an Investigator in Epidemiology at the Center for Health Research, Kaiser Permanente, and an adjunct professor at OHSU. John has been active on the Board of Directors of Oregon PSR since 2003, was Board President in 2007-2008 and again from 2010-2012, and has contributed significantly to our outreach and education efforts, particularly with regard to the human health effects of war.