Headshot photo of Maya E. O'Neil, Ph.D.

Maya E. O'Neil, Ph.D.

  • Associate Professor of Psychiatry, Division of Clinical Psychology, School of Medicine
  • Medical Informatics and Clinical Epidemiology, School of Medicine


Dr. Maya O’Neil is an Associate Professor at Oregon Health & Science University (OHSU) in the Department of Psychiatry and the Department of Medical Informatics and Clinical Epidemiology. She is Core Faculty in OHSU’s Clinical Psychology doctoral program. Dr. O’Neil is a licensed psychologist and Neuropsychologist at the Portland VA where she currently works as a Rural Telehealth, Posttraumatic Stress Disorder (PTSD), and Neuropsychology clinician. As a clinician, Dr. O’Neil conducts evidence-based mental health treatments for depression and PTSD (e.g., Prolonged Exposure, Cognitive Processing Therapy, Cognitive Behavioral Therapy, Acceptance and Commitment Therapy, and Behavioral Activation), neurocognitive assessments, and cognitive rehabilitation with Veterans who have PTSD, Traumatic Brain Injury (TBI), and other mental and physical health comorbidities. Dr. O’Neil also supervises trainees doing clinical work related to Rural Telemental Health, PTSD, Neuropsychology, Inpatient Mental health, and Substance Use. She also serves as a research mentor for psychology interns, postdoctoral fellows, and junior faculty.

Dr. O’Neil’s research focuses on assessment, treatment, and health services outcomes related to PTSD, traumatic brain injury (TBI), and common comorbidities. Dr. O’Neil is currently funded on a 5-year Career Development Award (CDA) through the VA’s Rehabilitation Research & Development program. Dr. O’Neil’s CDA focuses on conducting a randomized controlled trial of Compensatory Cognitive Training for Veterans with PTSD as well as tracking longitudinal cognitive outcomes for Veterans who engage in evidence-based psychotherapy for PTSD.  Previously, she was the recipient of an Agency for Healthcare Research and Quality K Fellowship at OHSU. Prior to the K fellowship, Dr. O’Neil was a Core Investigator for the VA Evidence-based Synthesis Program and AHRQ Scientific Resource Center for the Evidence-based Practice Center Program, working on projects related to mental health, TBI, and evidence synthesis methods. She has been a principal investigator on multiple evidence synthesis projects, including reviews of interventions for dementia, suicide prevention/risk assessment, TBI, and PTSD. She has also been a co-investigator on research and evidence synthesis projects related to functioning, health disparities, PTSD, TBI, pain, drug/alcohol abuse, and neuropsychological assessment. She has served as a statistics, methods, and research design consultant with a focus on development and validation of assessment tools and evidence synthesis methodology and dissemination. Dr. O’Neil has advanced quantitative methods training including linear and non-linear modeling for univariate and multivariate analyses, Exploratory and Confirmatory Factor Analysis, and Structural Equation Modeling methods.

Currently, Dr. O’Neil is a principal- or co-investigator on numerous grants investigating mental health and cognitive functioning. She has collaborated on multiple VA and DoD projects, including as a co-investigator and lead neuropsychologist for the Portland site of the Chronic Effects of Neurotrauma Consortium (CENC) longitudinal epidemiology study (now funded as LIMBIC) along with OHSU colleague Dr. Kathleen Carlson.

Information on her work related to cognitive rehabilitation with OHSU colleague Dr. Marilyn Huckans can be found here. Dr. O’Neil was recently funded to lead a project developing an fMRI protocol to examine neurophysiologic outcomes for Veterans with TBI and PTSD, and works with OHSU’s Advanced Imaging Research Center for this project. She has also obtained multiple years of funding to lead and develop the PTSD-Repository for the National Center for PTSD, available through the National Center for PTSD website, here.

Areas of interest

  • Post-traumatic stress disorder (PTSD)
  • Traumatic Brain Injury (TBI)
  • Neuropsychology
  • Cognitive Rehabilitation
  • Rural Telemental Health
  • Evidence Synthesis/Systematic Reviews
  • Quantitative Methods



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