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Leadership team

Committed to providing real and lasting improvements in the lives of patients with central nervous system issues, today and well into the future.

Neil Martin, MD

After more than 30 years at UCLA building a renowned neurosurgery program and implementing a comprehensive and innovative service-line clinical quality program, Neil Martin, MD, came to Geisinger in 2016 as chair of the Neuroscience Institute and chief quality officer.

Dr. Martin attended Yale University and earned his medical degree from the Medical College of Virginia. He completed his surgical internship and neurosurgical residency under the direction of Charles Wilson, MD, at the University of California, San Francisco. Dr. Martin also completed a clinical and research fellowship in Neurovascular Surgery, with Robert Spetzler, MD, at the Barrow Neurological Institute in Phoenix, Ariz.

Clinical interests

Dr. Martin has specialized in the research and treatment of neurovascular disorders, including arteriovenous malformation, aneurysm and stroke. He has published nearly 300 articles on his research in medical journals and texts, and conducted NIH-funded research on cerebral blood flow and metabolism, neurosurgical critical care and minimally invasive neurosurgery.

“I am very excited about the opportunities at Geisinger to take advantage of the strengths and unique perspectives of our providers and other professionals in neurology, neurosurgery, psychiatry and neuropsychiatry to deliver a complete array of services to our patients with central nervous system issues. On the quality front, Geisinger is already doing many things to move the needle in a positive direction. I am equally enthusiastic about how the Neuroscience Institute can take a leading role in building on that success.”

“We are seeking energetic physicians passionate about high quality and innovation in medical care. We have well-established neurology and neurosurgery residencies. We offer teaching opportunities and faculty appointments at the Geisinger Commonwealth School of Medicine in Scranton. We strongly encourage research, particularly involving population health, genomics, precision medicine and value-based healthcare. We are also seeking advanced practitioners to work hand in hand with our neuroscience physicians and nurse navigators for growth and development of our integrated clinical neuroscience programs.”
Neil Holland, MD

Neil R. Holland, MD

Neil R. Holland, MD, is chair of Neurology in the Geisinger Neuroscience Institute and clinical professor of medicine at the Geisinger Commonwealth School of Medicine. He is a neurologist with special interest and training in neuromuscular diseases. Dr. Holland is a fellow of the American Academy of Neurology and the American Association of Electrodiagnostic Medicine. He is also a member of the American College of Physician Executives.
Dr. Holland obtained his medical degree from the University College London School of Medicine and completed a residency in neurology at Johns Hopkins Hospital in Maryland in 1996 and an internship in internal medicine at York Hospital in Pennsylvania in 1998. 

He also completed a fellowship in clinical neurophysiology at Johns Hopkins in 1997. He is board certified in neurology, clinical neurophysiology, neuromuscular medicine and vascular neurology by the American Board of Psychiatry and Neurology. He also holds a master’s degree in business administration with a focus on medical management from the Isenberg School of Management at the University of Massachusetts.

Dr. Holland has a strong interest in medical education for our trainees and in finding new ways to improve access for our patients.
Margaret Jarvis, MD

Margaret Jarvis, MD

Margaret Jarvis, MD, is a practicing psychiatrist and chief of addiction services for Geisinger Addiction Medicine and the Geisinger Neuroscience Institute.

Dr. Jarvis received her medical degree from the Medical College of Virginia. She completed her psychiatry residency and addiction medicine fellowship at the same institution.


Dr. Jarvis is board certified in addiction medicine by the American Board of Preventive Medicine, and in addiction psychiatry and psychiatry by the American Board of Psychiatry and Neurology. She is the vice president and the chair of the Quality Improvement Council for the American Society of Addiction Medicine.

In her role as the clinical lead in the expansion of Geisinger’s treatment for patients with opiate use disorder, as well as other substance use disorders, Dr. Jarvis has emphasized the need for quality treatment for these patients

Paul Kettlewell, PhD

Paul W. Kettlewell, PhD

Paul W. Kettlewell, PhD, is a practicing psychologist and director of pediatric psychology and integrated behavioral health/primary care for the Geisinger Neuroscience Institute.

Dr. Kettlewell received his PhD in clinical psychology at Bowling Green State University. Prior to coming to Geisinger he was a clinical assistant professor at Indiana University School of Medicine in Indianapolis where he stayed as an attending staff member after completing his internship in clinical psychology. He is board certified by the American Board of Professional Psychology.

Dr. Kettlewell is a member of American Psychological Association (APA) and the Pennsylvania Psychological Association, where he has served in several leadership positions, including president. He received the Heiser Award from APA for advocacy work on behalf of the psychologists and is currently servicing in an elected position with APA on the Committee for the Advancement of Professional Practice.

Dr. Kettlewell has had several leadership roles at Geisinger and the community, including:

  • The founding director of the psychology internship and postdoctoral fellowship programs
  • The initiator of a behavioral health training program for pediatric residents
  • Developed a consultative service for pediatric psychologists in the ED and children’s hospital
  • A founding member and continued board member for Camp Victory (a program for children with chronic health problems)
  • Developed and leads the anxiety disorders clinic for children and adolescents
  • Leads the development of behavioral health/primary care integration at Geisinger

Dr. Kettlewell demonstrates a passion for innovative behavioral health program development and evaluation. He publishes research articles and presents at regional and national conferences. He is committed to providing evidence-based assessment and treatment to the pediatric patients he serves and to encouraging that commitment by the psychology staff and residents. Dr. Kettlewell’s primary focus is on improving access to care for those with behavioral health problems who receive no or inadequate care.

Michel Lacroix, MD

Michel Lacroix, MD

Michel Lacroix, MD, is chair of Neurosurgery and Neurosurgical Oncology for the Geisinger Neuroscience Institute. Dr. Lacroix is a fellow of the Royal College of Physicians and Surgeons in Canada and a diplomate of the American Board of Neurological Surgery.

Dr. Lacroix earned his medical degree from Université Laval in Quebec City, Canada. He completed his neurosurgery residency at the Montreal Neurological Institute, McGill University and Notre Dame Hospital, University of Montreal, in Montreal, Canada. He also completed a fellowship in Neurosurgical Oncology at MD Anderson Cancer Center in Houston, Texas. Dr. Lacroix is board certified by the American Board of Neurological Surgery. 

Clinical interests
Dr. Lacroix specializes in the treatment of brain, spinal cord and spine tumors, with a specific interest in skull base and pituitary tumors. He is dedicated to minimally invasive approach to the brain and spine, including endoscopic and exoscopic procedures, as well as novel laser therapy for brain pathologies. Dr. Lacroix is engaged in applying new virtual technology and physiological monitoring to assist in resection of lesions in eloquent areas of the brain as he is in the development of personalized medicine. 

“All of us at the Neuroscience Institute share a common enthusiasm in refining our understanding of neurologic disorders and improving on the treatment we provide to our patients. Geisinger is known for clinical innovation. We are actively building on our strength and reputation and can further the career of like-minded neuroscientists in many exciting domains. Whether you are a clinician, educator or researcher, there is a well of opportunity for you in this organization.” 

Stephen J. Paolucci, MD

Stephen Paolucci, MD, has been chairman of the Geisinger Department of Psychiatry since 1994, a time in which the department experienced steady growth. Geisinger is the largest provider of inpatient and outpatient mental health services in a five-county area of central Pennsylvania. Dr. Paolucci is also chief medical officer at Geisinger Bloomsburg Hospital and provides oversight to Geisinger’s Central Region community hospitals. 
He will be transitioning into a new role as system professionalism and provider experience officer at Geisinger after a successful search for a chair of Psychiatry is completed. In his new role, he will be responsible for advancing physician leadership program development, physician compensation, mentorship and performance review processes. Partnering with the Human Resources Department, he will develop and oversee programs to enhance physician recruitment, retention and engagement.

Dr. Paolucci received his medical degree from The Pennsylvania State University in 1982, and completed his residency in psychiatry at Wilford Hall USAF Medical Center. He is certified by the American Board of Psychiatry and Neurology and is a member of the Pennsylvania Medical Society.

“I am excited about helping Geisinger recruit, hire and retain talented, dedicated providers who share our vision for what healthcare is and can be. My goal is to continue to make Geisinger the place that clinicians want to work because of its history of innovation and excellent patient care and an approach to work/life balance that stresses communication, collaboration, collegiality and professional development.”

William R. Rakauskas, MD

William R. Rakauskas, MD, is a practicing psychiatrist and director of Psychiatry for the Geisinger Neuroscience Institute.

Dr. Rakauskas received his medical degree from Medical College of Pennsylvania. He completed his residency at Medical College of Pennsylvania Hospital, where he also served as chief resident in his fourth year. After residency, he joined a private psychiatric practice associated with Frist Hospital Wyoming Valley.
Following this, he came to Geisinger as an associate in 1991. Dr. Rakauskas was the head of emergency psychiatry for several years, then was appointed medical director of the Bloomsburg/Geisinger psychiatric unit in 1994. He has remained the medical director of this unit for over 22 years, including during the transition during which Bloomsburg Hospital became part of Geisinger. In addition, he has been the psychiatric consultant to Bloomsburg University for 20 years, working in the university’s counseling center. Dr. Rakauskas is also very involved in the psychiatric residency program, and is currently serving as the associate program director.

He is board certified by the American Board of Psychiatry and Neurology.

Dr. Rakauskas is a member of the American psychiatric Association. He has also served on various boards in the community.
Bradley Wilson, PhD

Bradley J. Wilson, PhD

Bradley J. Wilson, PhD, ABN, is a neuropsychologist and director of the Division of Adult Psychology and Neuropsychological Services for the Geisinger Neuroscience Institute.

Dr. Wilson received his PhD in Clinical Psychology from Nova University. He completed his internship at Henry Ford Hospital. He also has a Master of Science in Clinical Psychopharmacology from Farleigh Dickinson University.
He is board certified in Neuropsychology by the American Board of Professional Neuropsychology, with added subspecialty recognition in Rehabilitation Neuropsychology by the American Board of Professional Neuropsychology.

Dr. Wilson is a member of the American Psychological Association (APA), Division 40 of the APA, and the National Academy of Neuropsychology.

Clinical interests
While Dr. Wilson’s current practice is across a broad range of ages and conditions, interests of further note include dementia, moderate to severe TBI, autoimmune disease and cognitive impairment, vascular cognitive impairment, rehabilitation neuropsychology, research findings in neural networks, base rates and psychometrically guided principles for interpreting neuropsychological tests.