Kris Herfkens, PhD, ABPP-CN


Ioan Stroescu, Ph.D., ABPP-CN


Michael Zelson, Ph.D.

Lauren C. K. Goslin, LCSW

Susan Martin, M.Ed.

Mandy Kellogg

Practice Manager

Natalie Charamut


Dr. Herfkens is a board certified clinical neuropsychologist in private practice in Durham, North Carolina. Her practice is focused on diagnosis and treatment of adult neurocognitive disorders, with a subspecialty focus on geriatrics and MS. In addition, she has over twenty years experience in forensic neuropsychology in both civil and criminal litigation.

Dr. Herfkens received her bachelor’s degree from Carleton College and a doctorate in clinical psychology from the University of Tulsa, where she received an American Psychological Association Dissertation Research Award. Her post doctoral fellowship in clinical neuropsychology was at the University of Alabama at Birmingham School of Medicine.

She currently serves on the Clinical Advisory Committee of the Eastern Carolina Chapter of the MS Society and the North Carolina Psychology Board. Dr. Herfkens also regularly presents for the MS Society, as well as other patient advocacy groups.

Dr. Stroescu is a board-certified clinical neuropsychologist with expertise in general adult clinical neuropsychology. He has extensive neurocognitive consultation and clinical assessment experience with dementia and a wide range of neurological disorders, in both in- and out-patient settings.

Prior to joining Triangle Neuropsychology Services Dr. Stroescu was a senior neuropsychologist at NeuroCog Trials, focusing on neuropsychological outcomes in clinical trials of CNS disorders and he continues this work on a part-time basis. Prior to that he was a faculty neuropsychologist and assistant clinical professor at Barrow Neurological Institute in Phoenix, AZ.

He obtained a B.A. in Psychology and Biology from Columbia College in Columbia, MO. He earned his M.S. and Ph.D. with a concentration in Neuropsychology from Saint Louis University. He completed a neuropsychology specialty track internship at the Memphis VA Medical Center and Semmes Murphey Clinic and a post-doctoral fellowship at Emory University School of Medicine. He has authored/co-authored peer-reviewed publications and presentations and is fluent in German and Romanian.

Michael Zelson, Ph.D is a clinical neuropsychologist who has been practicing in outpatient clinic and inpatient rehabilitative settings since 1990. His practice is focused on the neuropsychological evaluation and treatment of adult acquired brain disorders, with particular emphasis on traumatic brain injury and cognitive disorders associated with aging. He is also experienced in assessing cognitive changes due to stroke and cerebrovascular disorders, Multiple Sclerosis and Parkinson’s disease. In addition to neuropsychological evaluation, he provides cognitive-behavioral psychotherapy with expertise in adjustment to illness/disability and psychological approaches to pain management. He earned a Bachelor’s degree in Psychology from the University of Pennsylvania in 1982 and a Doctoral degree in Clinical Psychology from the University of Delaware in 1989. He received post-doctoral experience in neuropsychology at the Institute for Brain Injury Research and Training in Camden, New Jersey. He is a member of the American Psychological Association and the National Academy of Neuropsychology.

Lauren has been working at TNS since December 2006. She administers neuropsychological tests and does psychotherapy. Lauren received her BA degree at the University of the South, and her MSW at Tulane University. Before she moved to Durham, Lauren was on staff at the Children’s Bureau of New Orleans in Project Last. This work included four years as a grief and trauma counselor for children who were the survivors of a homicide victim. During her Tulane internship, she worked as a school social worker at Woodson Middle School and as a youth group leader in the CJ Peete Housing Development. Previous work has included commercial photography, and she continues an interest in fine art photography.

Susan Martin, M.Ed. has been at Triangle Neuropsychology Services since July 2013. Susan administers neuropsychological tests and serves as Coordinator of Strategic Initiative and Outreach at TNS. Susan received her B.A. degree from St. Louis University and has a Master’s Degree in Education – Counseling from University of Missouri – St. Louis. Prior to moving to North Carolina, Susan worked in the Department of Neuropsychology at an acute rehab hospital, as well as at several grade schools as a school counselor and learning consultant.

Mandy is the primary point of contact at TNS for referral coordinators, scheduling, requests for records, and related information. Prior to her move to North Carolina this past spring, Mandy was the Medical Office Manager for San Jose Neurospine in the San Francisco Bay Area and responsible for three practice locations. She is a certified nursing assistant and is completing her BS in Healthcare Administration. Her prior experience also includes serving as a health unit coordinator for Intermountain Healthcare in Salt Lake City, Utah.

Natalie graduated from the University of North Carolina at Chapel Hill with a degree in Psychology and Political Science and joined the Triangle Neuropsychology team right after graduation.  At UNC, Natalie worked in two research labs as an undergraduate research assistant studying mood disorders and mental health stigma.  She has presented her research at multiple local and national conferences.  In her free time Natalie likes to watch movies, listen to music, and play with her three year old niece.