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G.V. (Sonny) Montgomery VA Medical Center


Leadership Team

Portrait of David M Walker

David M Walker | 601-362-4471x1432

Medical Center Director

David M. Walker, MD, MBA, DFAPA was raised in Vicksburg and Clinton, Mississippi, and received his undergraduate degree in Chemistry (BS) from the University of Southern Mississippi. He then joined the United States Air Force and attended medical school at the Uniformed Services University of the Health Sciences (USUHS). After medical school, he chose a combined military/civilian residency in psychiatry at Wright Patterson AFB/Wright State University in Dayton, Ohio. Upon completion of military residency training, he served at Travis AFB before pursuing an interest in forensic psychiatry.
• Led the combined Air Force/VA psychiatric unit and held a faculty appointment at the University of California at Davis completing fellowship training in forensic psychiatry at the University of South Carolina.
• Chief of Hospital Psychiatric Services at Lackland AFB
• Faculty appointment at the University of Texas Health Sciences Center at San Antonio.
• Clinical Director of Forensic Services for Georgia’s only maximum-security forensic hospital, Central State Hospital (CSH).
• Taught medical students from Mercer University (Macon, Ga) and forensic psychiatry fellows from Emory University (Atlanta).
• 2009-Medical Director of Mental Health and Behavioral Sciences at the Robley Rex VA Medical Center in Louisville
• 2009-Associate Chair of Veteran’s Programs for the Department of Psychiatry at the University of Louisville.
• 2012-named Deputy Chief of Staff for VA in Louisville.
• 2013, appointed Associate Chief of Staff for Ambulatory Care for VA in Louisville.

Dr. Walker is a member of the American College of Healthcare Executives. He is a Distinguished Fellow of the American Psychiatric Association and has served as president of the Kentucky Psychiatric Medical Association. Dr. Walker also completed a Master of Business Administration degree (MBA) in 2012 at the University of Louisville

Portrait of Joseph P Vaughn

Joseph P Vaughn | 601-362-4471x1204

Associate Director

Joseph Vaughn was appointed Associate Director of the G.V. (Sonny) Montgomery VA Medical Center on August 23, 2015. Prior to his appointment, Mr. Vaughn served as the Assistant Director.

Mr. Vaughn served in the United States Navy from 1983 – 1993 completing four Mediterranean cruises and was awarded the Navy Commendation Medal. Prior to joining the medical center in Jackson, Mr. Vaughn served as the Chief Logistics Officer for the South Central VA Health Care Network, an integrated system of 10 VA medical centers providing a full range of specialty, tertiary, mental health, and long term care in an eight-state region, where he managed all aspects of the supply chain and vehicle fleet programs within the network.

Mr. Vaughn is a native of Durant, Mississippi and received his Bachelor of Science degree from the University of Phoenix in Information Technology, and has a Master’s degree in Business Administration from Mississippi State University. He is a 2012 graduate of the Veterans Health Administration (VHA) Health Care Leadership Development Program and a 2013 graduate of the Federal Executive Institute. Mr. Vaughn holds the Senior Level Federal Acquisition Certification for Program and Project Managers, and American Hospital Association Certified Material and Resources Professional and is also a member of the American College of Health Care Executives.

Portrait of Susan A Roberts

Susan A Roberts | 51432

Chief of Staff

Susan A. Roberts, DO, MPH, MBA, FACP, was appointed Chief of Staff on November 27, 2016. Prior to this appointment, she served as the Interim Chief of Staff at the Gulf Coast VA Health Care System in Biloxi, Mississippi.

Dr. Roberts received her Master’s Degree in Public Health from the University of Rochester, and her Master’s Degree in Business Administration from Oregon Health and Sciences University. She is Board Certified in Internal Medicine, a Fellow of the American College of Physicians and a member of the American College of Healthcare Executives. She has extensive experience in various medicine programs and has served in a leadership capacity since 2010.

Portrait of Eva M Santoyo

Eva M Santoyo |

Associate Director of Patient Care Services

Eva Santoyo was appointed as the Associate Director of Patient Care Services of the G.V. (Sonny) Montgomery VA Medical Center on June 11, 2017. Prior to her appointment, Ms. Santoyo served as the Associate Chief of Nursing for the Harry S Truman VA Medical Center in Columbia, Missouri. She began her career with VA as the Nurse Manager of the Community Living Center in 2010.

Ms. Santoyo received her Master’s Degree in Healthcare Administration from the University of Missouri – Columbia and her Bachelor’s Degree in Nursing also from the University of Missouri – Columbia. She is certified as a Nurse Executive Advanced and a member of the American Psychiatric Nurses Association. She has extensive experience in various nursing roles and has been in a leadership capacity since 1999.

Portrait of Patricia A Lane

Patricia A Lane | 601-362-4471x1485

Assistant Director

Patricia A. Lane, LCSW-C was appointed the Assistant Director in September 2016. Prior to her appointment as the Assistant Director, she was the Chief of Social Work at the G.V. (Sonny) Montgomery VA Medical Center. Ms. Lane began her VA career as a Social Worker within the VA Maryland Health Care System (VAMHCS) in 2003. Ms. Lane was responsible for the development of permanent housing of Homeless Veterans or at risk of homelessness through the VA Enhanced Use Lease Program, and development and execution of a Community Resource and Referral Center within the community. Other work experiences includes over eight years with the Maryland Department of Corrections as a Case Management Specialist and Special Assistant to the Warden of Western Correctional Institution and as a service provider for the mentally ill, substance abuse, and homeless populations of Baltimore City.

Ms. Lane received a Bachelor of Science degree in Psychology from Frostburg State University and a Master’s degree of Social Work from the University of Maryland at Baltimore. She holds licenses as a Clinical Social Worker and a Substance Abuse Counselor from the State of Maryland. Ms. Lane is a 2006 graduate of the Leadership Development Institute and her individual LDI project was selected to be presented to VISN 5 Executive Leadership Board. This project generated an 8.1 million dollar return on investment. She has also completed Yellow and Green Belt Certification and was a Contracting Officer Representative for many years. She is a member of the National Association of Social Workers, National Coalition of Homeless Veterans, Board Member of the Mississippi Balance of State Continuum of Care; and the American Correctional Association.