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David Cifu, M.D.
Co-Director, Richmond
David Cifu, MD, is an Eminent Scholar, the Associate Dean for Innovation and System Integration in the Virginia Commonwealth University (VCU) School of Medicine, Herman J. Flax, MD Tenured Professor and the Chair of the Department of PM&R in the VCU-School of Medicine in Richmond, Virginia. He is also Chief of PM&R Services for the VCU Health System, Founding Director of the VCU-Center for Rehabilitation Sciences and Engineering (CERSE), Senior Consultant for the Sheltering Arms Institute, and Senior TBI Specialist for the U.S. Department of Veterans Affairs. He has been funded on 60 research grants for over $286 million, including currently serving as Principal Investigator of the VA/DoD $116.5 million Long-term Impact of Military-relevant Brain Injury Consortium (LIMBIC) since 2013. Dr. Cifu is also Co-Director of the VA Brain Health Coordinating Center.
Lisa A. Brenner, Ph.D.
Co-Director, Aurora
Lisa A. Brenner, PhD, is a Board-Certified Rehabilitation Psychologist, and a Professor of Physical Medicine and Rehabilitation, Psychiatry, and Neurology at the University of Colorado, Anschutz Medical Campus. Dr. Brenner is a Senior Clinical Investigator at the Department of Veterans Affairs Rocky Mountain Regional Medical Center, and Co-Director of the VA Brain Health Coordinating Center. She also co-leads the Military and Veteran Microbiome Consortium for Research and Education (MVM CoRE). She is the current Chair of the International Brain Injury Association and a Past President of Division 22 (Rehabilitation Psychology) of the American Psychological Association (APA), as well as an APA Fellow. She serves as an Associate Editor of the Journal of Head Trauma Rehabilitation. Dr. Brenner is a leading expert in the field of traumatic brain injury and comorbid psychiatric disorders. She has over 250 peer-reviewed publications, participates on national advisory boards, and has co-authored a book titled: Suicide Prevention After Neurodisability: An Evidence-Informed Approach. She is also a Co-Editor of the APA Handbook of Rehabilitation Psychology (3rd Edition) and is the current Editor of the Oxford University Press Academy of Rehabilitation Psychology Series.
Molly Sullan, Ph.D.
Deputy Director, Aurora
Molly Sullan, PhD, is a clinical research neuropsychologist at the VA Eastern Colorado Healthcare System and an Assistant Professor of Physical Medicine and Rehabilitation (PM&R) at the University of Colorado, Anschutz Medical Campus. Her research is focused on health-related outcomes following traumatic brain injury, military-related blast exposure, and environmental/toxic exposures. Clinically, she has experience in the assessment of a broad spectrum of neurological disorders with both civilian and Veteran populations. She earned her doctorate degree in Clinical and Health Psychology, with a specialization in neuropsychology, from the University of Florida. She completed her pre-doctoral internship and her two-year neuropsychology fellowship at the VA San Diego Healthcare System/University of California, San Diego.
Angel Garcia, MBA
Lead, Operations
Angel Garcia is a business leader and program manager with more than two decades of financial, strategic, and administrative experience. Her extended experience includes clinical program development and operations, financial management, budgeting, and auditing, structural plant design, development and operations, policy and procedure development and implementation, staff management, and problem resolution. Strong analytical skills coupled with excellent interpersonal skills and professionalism, focused on excellence in business.
Josh Hahn, MM
Program Development Advisor
Mr. Hahn is Associate Director of Research Development for the Center for Rehabilitation Science and Engineering (CERSE) within the Department of PM&R, School of Medicine, at Virginia Commonwealth University, where he supports more than 60 researchers with more than $100 million in overall federal research funding.
Andrew Hoisington, Ph.D.
Lead, Biological Mechanisms
Dr. Hoisington is currently a supervisory health scientist and leads a biological laboratory team in the Eastern Colorado Health Care System, Department of Veterans Affairs. He co-leads the Brain, Body, Biome, and Behavior Health Laboratory (B4 Health) and is the Associate Director of the Military and Veterans Consortium for Research and Education (MVM-CoRE). Hoisington also holds appointments as an Assistant Professor at the University of Colorado Anschutz, Department of Physical Medicine and Rehabilitation, and Adjunct Associate Professor at the Air Force Institute of Technology. Dr. Hoisington received his undergraduate degree from the University of Michigan and his master's and PhD degrees from the University of Texas at Austin. Dr. Hoisington retired as a Lieutenant Colonel from the United States Air Force, where he served as a Civil Engineering Officer. During his time in service, he taught for nine years at the United States Air Force Academy and at the Air Force Institute of Technology. Dr. Hoisington’s overall research interest includes the intersection of human microbiome and mental health, connections between microbiome of the built environment and mental health, and associations between the built environment and mental health outcomes. He has been using molecular approaches to investigate human-related biological targets in mental health for over a dozen years.
Ryan Holliday, Ph.D.
Lead, Clinical Implementation and Outcomes
Dr. Holliday is a Senior Clinical Research Psychologist and a member of the Central IRB in the Department of Veterans Affairs. He is also an Assistant Professor in the Departments of Psychiatry and Physical Medicine & Rehabilitation. He received his PhD in Clinical Psychology from the University of Texas Southwestern Medical Center and completed an Advanced Psychology Fellowship at the Rocky Mountain Mental Illness Research, Education and Clinical Center for Suicide Prevention. Dr. Holliday is passionate about understanding the intersection between stressful life events (such as homelessness and justice involvement), traumatic experiences, health factors (e.g., traumatic brain injury), and suicide. He is further interested in translating research on this intersection into evidence-based suicide prevention practice. To date, Dr. Holliday has published over 100 peer-reviewed articles and has been consistently funded for the past decade.
Amol Karmarkar, PhD
Lead, Data
Karmarkar is a Professor in the Department of PM&R, School of Medicine, at Virginia Commonwealth University, Director of Research at Sheltering Arms Institute (SAI) and researcher with the Central Virginia Veterans Medical Center (Richmond VA). Dr. Karmarkar is a health services and health policy researcher with advanced training in health services and policy research, public health and Epidemiology with extensive experience in utilizing Medicare, Medicaid, commercial claims, longitudinal studies, VINCI data and Electronic Health Records for the research studies. Dr. Karmarkarhave established and current leads a VCU-wide Data Hub that provides researchers, clinicians, and trainees across VCU with access to Medicare, Virginia All-Payer Claims Data, other claims/large registry data; and optimized functionality of the TriNetX system to study VCU Health patient populations, service utilization, and outcomes.
Adam Kinney, Ph.D.
Lead, Digital Dashboards and Tools
Adam Kinney, PhD, OTR/L, is an Occupational Therapist, Research Health Science Specialist in the Rocky Mountain Mental Illness Research Education and Clinical Center (MIRECC), and an Assistant Professor of Physical Medicine and Rehabilitation (PM & R) at the University of Colorado, Anschutz Medical Campus. His primary area of research focuses on promoting Veterans’ receipt of evidence-based treatment for sleep conditions following traumatic brain injury. He is also interested in understanding how multi-level determinants (e.g., person-, provider-, system-, or societal-level) influence service delivery and positive outcomes among individuals with a history of traumatic brain injury and other potentially disabling conditions.
Daniel Klyce, PhD, LCP, ABPP
Co-Lead, Clinical
Implementation and Outcomes
Klyce is an Associate Professor in the Department of PM&R, School of Medicine, at Virginia Commonwealth University and a research psychologist with the Central Virginia VA Health Care System, where he is the co-director for the Richmond Polytrauma Rehabilitation Center’s Traumatic Brain Injury (TBI) Model Systems project. Dr. Klyce’s specialty is brain injury rehabilitation. His clinical expertise includes delirium management, neurocognitive assessment, adjustment to trauma, and interprofessional approaches to rehabilitation. His research interests include clinical measurement, supporting caregiving families, social determinants of health, and brain injury as a chronic condition among veterans and service members. Dr. Klyce serves on the boards of multiple scientific and service organizations, including the editorial board for his field’s flagship journal, Rehabilitation Psychology, and on the board of directors for both the Academy of Rehabilitation Psychology and the Brain Injury Association of Virginia.
Landon Lempke, PhD
Lead, Digital Dashboards and Tools
Dr. Lempke is an Assistant Professor in the Department of PM&R, School of Medicine, at Virginia Commonwealth University with a research appointment researcher at the Central Virginia Veterans Medical Center (Richmond VA). His research focuses on concussion healthcare and brain health in civilian and military populations, with emphasis on movement biomechanics, objective medical clearance decision-making, and clinical optimization techniques. He has published over 60 peer-reviewed articles while leading industry, foundation, and federal grants supporting his work, which has been recognized by national organizations such as the Biomedical Engineering Society, the American Kinesiology Association, and the Pediatric Research in Sports Medicine Society.
Scott McDonald, PhD, ABPP
Co-Lead, Clinical
Implementation and Outcomes
Dr. McDonald is an SCI Neuropsychologist and Director of the VA Mid-Atlantic Mental Illness Research Education Clinical Center’s (MIRECC) Advanced Psychology Fellowship Program at the Central Virginia VA Health Care System. He has an affiliate Associate Professor appointment n the Department of PM&R, School of Medicine, at Virginia Commonwealth University and an Assistant Professor appointment in the Department of Psychology. Dr. McDonald’s research aims to better understand mental health, resilience, and adjustment after acquired physical disability. He was the recipient of a VA RR&D Career Development Award-2 (2012-2017) that aimed to better understand resilience and adjustment in the year following polytraumatic and spinal cord injuries (SCI). Current research explores medical and psychosocial determinants of important health and mental health outcomes and the development of interventions to improve the well-being of Veterans living with traumatic brain injury (TBI) and SCI.
Paul B. Perrin, Ph.D.
Richmond Lead for Clinical Trials
Dr. Perrin is a Professor of Data Science and Psychology at the University of Virginia and a Research Psychologist at the Central Virginia Veterans Affairs Healthcare System, where he co-directs the Polytrauma Rehabilitation Center Traumatic Brain Injury Model Systems program. He is editor of the journal Rehabilitation Psychology, and his work focuses on psychological adjustment to traumatic brain injury and spinal cord injury in Veterans and Service Members. He uses a combination of machine learning and community-based participatory approaches to investigate how to bring evidence-based and cost-effective rehabilitation care to medically underserved Veterans and Service Members with these disabilities, especially in rural communities via telehealth.
U.S. Department of Veterans Affairs | 810 Vermont Avenue, NW Washington DC 20420
Updated/Reviewed: 2025-06-11