David A. Clayman, Ph.D.

Clinical & Forensic Psychologist

David A. Clayman, Ph.D., is a Clinical and Forensic Psychologist with a wide range of practical experience in dealing with “people problems.” He has developed and managed a large professional practice, a software company, an executive consulting and assessment business, as well as a multi-faceted program addressing concerns in the corrections industry. 

Dr. Clayman has over 30 years of experience in the forensic psychological evaluation field. He has been known as a friend to the court, offering nonbiased reports for criminal and civil litigation. He has completed an estimated 4,500 evaluations and has testified as an expert witness in state and federal courts. In the past he served as a Medical Expert to the Office of Hearings and Appeals the Social Security Administration. Clinically, his “no nonsense approach” to complex issues has become his trademark as he helps individuals, families, businesses and organizations define problems and implement practical solutions. 

Dr. Clayman is in demand as a speaker who helps groups retain a value-oriented approach to achieving success. He works with displaced and stressed executives. Additionally, Dr. Clayman has been involved in crisis management activities with a wide range of business, organizations and community groups. [SEE VITA]

Dr. Clayman received his B.A. in Psychology from Trinity College in Hartford, Connecticut and his Ph.D. in Clinical Psychology from the University of Vermont. He joined the faculty at West Virginia University Medical School, Charleston Division, in 1974. In 1981, he founded Process Strategies Institute, a full-service mental health practice, and served as its CEO/Director. In 2001, this practice merged with another group and after three years, in the spring of 2004, he went back into private practice and is now the Director of Clayman & Associates, PLLC. 

Dr. Clayman has been active in many community, business and professional organizations. serving on the boards of what has come to be known as Hospice Care, Inc. and Mission West Virginia, an initiative of Governor Cecil Underwood, linking faith communities with various educational and health programs. For the former he was the founding president and was the original Chairman of the Board for the latter on which he still serves. Currently, he serves on the board of directors of Leadership West Virginia. For his outstanding leadership and dedicated service to the mental health community he was presented the 2009 Mildred Mitchell-Bateman, M.D. Tribute Award by the Mental Health Association of the Greater Kanawha Valley. He has been elected member-at large to the board of the West Virginia Psychological Association and serves as the West Virginia designee to the American Psychological Association as Public Education Coordinator and Federal Advocacy Coordinator. In the past, Dr. Clayman has been a state finalist in the Entrepreneur of the Year program (1992 and 1998) and was one of the ten honorees in the Who’s Who in Business in West Virginia in 1997.  Dr. Clayman was inducted into the West Virginia Executive Magazine's Health Care Hall of Fame in March of 2020.

Dr. Clayman resides in Charleston, West Virginia, with his wife, Janet, and their cat. 

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Steven Cody, Ph.D.
Clinical & Forensic Neuropsychologist

Before assuming his current position with Clayman & Associates, PLLC, Dr. Cody was Professor of Medical Psychology at Marshall University where he served on the faculty of the School of Medicine for 24 years. Dr. Cody has more than two decades of experience teaching undergraduate and graduate students in psychology as well as medical students in behavioral medicine, psychopathology, neuroscience, and geropsychology. In addition, he has extensive experience in clinical teaching and supervision and in clinical and institutional consulting. His clinical experience includes practice in inpatient and outpatient primary care, inpatient and outpatient rehabilitation settings, and inpatient and outpatient mental health care. He has offered workshops and other presentations on a variety of topics in clinical psychology and neuropsychology at local, state, and national levels. Dr. Cody also serves as Director of Psychology at Mildred Mitchell-Bateman Hospital.

Dr. Cody's principal areas of practice have been clinical and forensic neuropsychology. He has experience in a wide range of settings including inpatient and outpatient mental health, rehabilitation, general hospital, and primary care. [SEE VITA]

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Nathaniel R. Stephenson, Psy.D.
Clinical & Forensic Psychologist

Nathaniel R. Stephenson, Psy.D. is a licensed psychologist who joined Clayman & Associates full-time in September 2020. His training and experience have prepared him well for a career in forensic psychology.  Dr. Stephenson has a particular interest in working with complex cases involving numerous types of mental health issues including intellectual and developmental disabilities, serious mental illness, substance abuse, and personality disorders.

The main focus of his practice is criminal litigation. His activities include assessing competence to stand trial, criminal responsibility, diminished capacity, and risk. Dr. Stephenson brings special competencies pertaining to assessment of violence and sexual risk which is particularly relevant to sex offender presentence evaluations. Law Enforcement Pre-hire Evaluations as well as Fitness for Duty, Risk Assessments and Return to Work Assessments are other areas of his current practice. In addition, Dr. Stephenson works as part of the civil litigation team helping to assure that case formulations are based on appropriate literature and careful analysis of all factors that contribute to an opinion. He offers perspectives based upon his other experiences working in the community with homeless and other vulnerable populations many of whom have come into contact with the legal system.

Dr. Stephenson graduated from Elon University in 2012 after which he completed a M.S. degree in Rehabilitation Counseling and Psychology from the University of North Carolina at Chapel Hill in 2014. He then spent a year working on the Forensic Assertive Community Treatment Team in Portland, Oregon. In 2015, he enrolled in the Marshall University Clinical Psychology training program completing his degree in 2019. He began his association with Clayman & Associates at this time and continued regular involvement while he was completing his pre-doctoral internship at the Oklahoma Forensic Center -Northeastern Oklahoma Psychology Internship Program. Dr. Stephenson obtained further forensic training as a Post-Doctoral Fellow at Tulane University Medical School/Eastern Louisiana Mental Health System.

Outside of work, Dr. Stephenson enjoys time with his family, dogs and friends, exercising, and taking in the natural beauty of the Appalachian Mountains. [SEE VITA]

Jennifer Onks, M.A., MBA
Director of Operations

Jennifer Onks is currently the Director of Operations at Clayman & Associates. Her duties include managing daily operational activities, project planning, contracts and budgets, vendor relations and human resources.

A 2005 graduate of Marshall University, Jennifer obtained her master's degree in Clinical Psychology. She is also a 2018 MBA program graduate from West Virginia University.

In January 2002, Jennifer joined the Clayman & Associates team as an intern during her final semester as an undergraduate. During her tenure she has been in several roles including psychometrist and supervised psychologist. She has had many responsibilities including government contracts within the regional jail and correctional setting. She has interviewed and screened over 10,000 inmates throughout her career and has worked in conjunction with a large, multi-million dollar company providing human resource assistance with resume review, pre-hire testing, and panel interviewing. She is well versed in psychological testing and has performed assessments on disability applicants, Child Protective Services clients, and has provided educational recommendations. She also consults with Dr. Clayman with clients in need of organizational recommendations.

Jennifer is a graduate of the Leadership West Virginia Class of 2016.

In December 2018, Jennifer completed her MBA from West Virginia University.

Sarah Ginn
Sarah Ginn, M.A.

After obtaining a Master of Arts degree in clinical psychology from Ball State University in 2000, Sarah Ginn worked in Indiana for over six years as the chief psychometrician where she primarily tested nursing home residents. 

Originally from the Charleston/Huntington area, Sarah returned home in 2008 and began her work as a psychometrician with Clayman & Associates. In that time, she has provided testing services to a wide array of clients, ranging from 13 years old to 89 years old, and for a variety of reasons such as criminal responsibility and competency, parental fitness, pre-employment, and dementia. 

When not working, Sarah enjoys spending time with her family, reading science fiction, and exercising. 

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Ashley Hoey
Forensic Services Coordinator

Ashley joined Clayman & Associates in 2015.  She serves as liaison between our clients and staff and is in charge of office administration and graphic design/marketing. She studied Fine Arts with a minor in Psychology at WVSU and Marshall University. She is also an artist whose work has been shown in the U.S. and abroad.