OUR TEAM
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Dr. Walker S. Carlos Poston, M.P.H., Senior Scientist
Dr. Poston has graduate degrees in the behavioral sciences (University of California, Santa Barbara) and epidemiology (University of Texas Houston Health Science Center, School of Public Health). more
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Dr. Sara Jahnke, Senior Scientist
With over a decade of research experience on firefighter health, Dr. Jahnke has been the principal investigator on 10 national studies as well as dozens of studies as a co-investigator. more
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Annette Carrar, Chief Financial Officer
Annette Carrar created a viable organization by reorganizing and transferring the research and administrative activities of NDRI to NDRI-USA, INC. more
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Dr. Christopher K. Haddock, Senior Scientist
Dr. Haddock completed graduate work in both Clinical Psychology and Statistics and Research Methodology at the University of Memphis and the Pennsylvania State University... more
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Dr. Lindsey Jarrett, Director of Program Evaluation
Lindsey Jarrett, PhD, serves as Principal Investigator and Program Director for the Ethical AI Initiative sponsored by the Center and regional collaborators to identify and articulate ethical problems… more
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Dr. Richard Gist, Senior Scientist
Dr. Gist is a public health educator trained in behavioral epidemiology, community education, and analysis/evaluation of service delivery systems. more
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Dr. Brittany Hollerbach, Associate Research Scientist
Dr. Hollerbach received her Ph.D. in Kinesiology from Kansas State University and completed a postdoctoral research fellowship at Skidmore College under the direction of Dr. Denise Smith where she focused on cardiovascular disease in the fire service. . more
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Dr. Nattinee Jitnarin, Scientist
Dr. Jitnarin received her doctorate in Health Psychology with a Health Behavioral Science Emphasis at the University of Missouri-Kansas City ... more
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Dr. Christopher M. Kaipust, M.P.H. Associate Research Scientist
Dr. Kaipust received his Master of Public Health in Epidemiology from the University of Texas School of Public Health (UTSPH). He then completed his Ph.D. in Epidemiology …. more
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Daniel DeGryse, Director of Coaching & Outreach
Daniel DeGryse is a retired battalion chief with 30 years of experience working for the Chicago Fire Department and over 30 years of experience in the field of addiction and mental health... more
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Dr. Maria Koeppel, Associate Research Scientist
Dr. Koeppel received her Ph.D. in Criminal Justice from Sam Houston State University where she worked for the Crime Victims' Institute and the Correctional Management Institute of Texas. more
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Jeanne Barnhill, Senior Graphic Designer
Jeanne Barnhill is a Senior Graphic Design Specialist with 25+ years of successful experience in the complete design process. more
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Christina Donawa, SPHR, SHRM-SCPtem, Director of Human Resources
Christina Donawa is the Director of Human Resources for NDRI-USA, responsible for all human resource policies, programs, and services for the organization. more
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Blake Skola, Research Assistant
Blake Skola currently manages the social media pages for the Center for Military & Veterans Health Research and the Center for Fire, Rescue & EMS Health Research. more