Management Biographies

Kirk Rothrock
President & Chief Executive Officer

Mr. Rothrock has 25 years of experience in a wide variety of roles in the health care services industry.  Prior to joining Sentient in 2010, he was President and CEO of Spectrum Laboratory Network, a clinical laboratory serving over 5,000 physician practices and operating 12 in-hospital laboratories.  He also served as Chairman and CEO of CompBenefits, a specialty benefits insurer and was President of Intracorp, the nation's largest medical management services provider to the healthcare and workers' compensation insurance industries. 

Mr. Rothrock holds a Bachelor of Science degree in Education and a Master of Business Administration degree in Finance from The Pennsylvania State University.

Mr. Rothrock's unique experiences across the healthcare delivery and financing spectrums will contribute to Sentient's continued growth and success.

Stephen Oppenheimer, MD, Ph.D.
Chief Medical Officer

Dr. Stephen Oppenheimer, M.D., Ph.D., with Sentient Medical Systems, is a graduate of the Universities of Oxford and London. He holds doctorates in Neurophysiology and Medicine and is trained in Internal Medicine, Cardiology, and Neurology.  Dr. Oppenheimer joined Sentient Medical Systems in November, 2005. Prior to that, he was the founding Director of the Stroke Program and the Director of the Neurocardiology Laboratories at the Johns Hopkins Medical Institutions (Baltimore, MD). Dr. Oppenheimer held professorial appointments in Neuroscience, Neurology, and Cardiology at Johns Hopkins University as well as the New Jersey Neurosciences Institute and the University of Western Ontario. He is internationally recognized for his basic and clinical research on stroke and neural control of the heart. In addition, he has published nearly 200 scientific articles, and co-authored a book, Stroke Medicine, with Professors Martin Brown and Hugh Markus.  

Dr. Oppenheimer sits on the Editorial Board of Cerebrovascular Disease and European Neurology and reviews for 20 other major international journals. He has chaired and/or participated in review committees for the NIH, American Heart Association, the Welcome Foundation (UK) and Swiss and Canadian Governmental Medical Research Agencies. Dr. Oppenheimer has received national and international awards for his Neuroscience research and has been a visiting Professor at several Universities.  

Dr. Oppenheimer’s knowledge and background, combined with his thoughtful vision regarding the future of neurodiagnostics and neuromonitoring, continue to drive Sentient to higher and more sophisticated standards of care. 

Alexander Razumovsky, Ph.D., F.A.H.A.
Sentient NeuroCare Services Director

Dr. Razumovsky, a graduate of the Tbilisi State University (Tbilisi, Georgia (Former USSR), is the Director of Sentient NeuroCare Services, a subsidiary of Sentient Medical Systems. He holds a doctorate degree in Neurophysiology and a master’s degree in Biophysics. Dr. Razumovsky began his career in the U.S. in 1990 at the Johns Hopkins University where he was founding director of Neurosonology services for the Johns Hopkins hospital. There he held both professorial and research appointments in the departments of Anesthesiology/Critical Care and Neurology. In September of 2002, Dr. Razumovsky left Hopkins to join Sentient Medical Systems with the goal of furthering the clinical applications of neurosonology.

Dr. Razumovsky is internationally recognized for his basic and clinical research on the Pathophysiology of Cerebral Blood Flow. He has published more than 50 scientific articles in peer reviewed journals, has authored book chapters, and has been invited to write and review numerous journal articles. From 2001 to 2007 Dr. Razumovsky was appointed to the Board of Directors for the American Society of Neuroimaging. In 2009 he was elected to the Executive Committee of the Neurosonology Research Group of the World Federation of Neurology (NSRG-WFN). He is also currently a Fellow of the American Heart Association, the European Society of Neurosonology and Cerebral Hemodynamics, the Neurosonology Research Group of the World Federation of Neurology, and the International Cerebral Hemodynamics Society. In 2004, Dr. Razumovsky received the John & Sophia Prockop Memorial Lectureship Award for a paper he published in the Journal of Neuroimaging. In 2009 Dr. Razumovsky was honored by the American Society of Neurophysiologic Monitoring when he presented with their award for Scientific Achievement.

Dr. Razumovsky’s unique knowledge and experience in the area of neurodiagnostics has positioned Sentient NeuroCare Services as a leading provider of these services.  Over the past years Dr. Razumovsky has tirelessly contributed to the growth and innovation of this diagnostic services organization.

Robin Brooks
Senior Vice President & Chief Financial Officer

Ms. Brooks has been affiliated with Sentient since 2008 and was appointed to her current role in 2010.  In her career, she has held a variety of financial leadership positions, including Vice President at Marriott International, Controller at INOVA Health System and Director at the National Hospital for Orthopaedics and Rehabilitation.  She also has significant payor experience after working at Blue Cross & Blue Shield of Indiana.

Ms. Brooks holds a Bachelor of Science degree in Accounting from Indiana University and a master of Business Administration degree in Finance from Virginia Polytechnic Institute.  She is  a Certified Public Accountant in Virginia.

Ms. Brooks significant financial knowledge and her experience leading operational improvements to generate positive financial results are being applied to Sentient's business activities with great success. 

Robert Langsdale
Senior Vice President & Director, Information Technology

Mr. Langsdale earned his BA in Economics from the University of Colorado at Boulder in 1982, and pursued a career in bank management and commercial lending. The dawn of the internet age and his passion for technology spawned a career change to IT in the early ’90’s. As a Senior Systems Engineer with RESI, a web-hosting affiliate of Towson University, Mr. Langsdale consulted for Sentient for over two years prior to joining the firm in 2005.

As IT Director, Mr. Langsdale draws on this unique background that combines seasoned business skills and advanced technical expertise. He is responsible for planning and executing an IT strategy that supports the corporate goal of continuing growth while controlling costs. He also serves as the Lead Architect for designing the new Sentient infrastructure that streamlines the data transfer process, and assumes a technical lead for maintaining this complex deployment with multiple locations.

Charles Yingling, PhD, CNIM, DABNM, FASNM
Director of Education

Dr. Charles Yingling is internationally known as one of the top practitioners and educators in the field of intraoperative neurophysiology. He received his PhD from Rice University in 1975, where his PhD thesis concerned the regulation of evoked potentials by thalamic gating via the thalamic reticular nucleus. He subsequently moved to the University of California, San Francisco, where he was Professor of Neurological Surgery and Anesthesia and Director of the UCSF Neuromonitoring service from its inception in the early 1980’s until 2002.

He was a founding Board member of the American Society of Neurophysiological Monitoring (ASNM), a Fellow of the ASNM, and served as ASNM President in 1997-98. He was also a founding Board member of the American Board of Neurophysiologic Monitoring (ABNM), and of the American Board of Neurophysiologic Monitoring Programs (ABNMP). He has published numerous journal articles and book chapters on many topics in neuromonitoring, including cranial nerve monitoring during skull base surgery, transcranial motor evoked potentials, corticospinal tract mapping, and selective dorsal rhizotomy, and has personally monitored over 4,000 surgical cases in the operating room.