Chief Executive Officer
John Corbeil joined HCA Houston Healthcare Kingwood as Chief Executive Officer (CEO) in January 2019. He previously served as Chief Operating Officer of Medical City Fort Worth, an HCA Healthcare affiliated hospital in Fort Worth, Texas, for three years. Corbeil also held multiple executive leadership roles in HCA Healthcare's North Texas Division, including Associate Chief Operating Officer at Medical City Dallas, Assistant Administrator for Medical City Fort Worth, and Administrative Fellow for the North Texas Division Office. John joined HCA Healthcare in May of 2012.
Corbeil earned both his bachelor's degree in business administration and his master's degree in health administration from the University of Iowa. He is a member of the American College of Healthcare Executives and Leadership North Texas. He is also a board member of The University of Iowa's College of Public Health and The Lake Houston Chamber of Commerce, which is focused on community involvement, economic development, and city planning.
Sterling Ray III, MD
Chief Medical Officer
Sterling Ray, MD, was appointed Chief Medical Officer (CMO) of HCA Houston Healthcare Kingwood and North Cypress in 2019. Through Dr. Ray's leadership, HCA Houston Healthcare Kingwood will focus on further enhancing our patient outcomes and ensure that our quality and HCAHPS are on an upward trajectory.
Previously, Dr. Ray was the Associate Chief Medical Officer of Sound Physicians in Austin. In his previous roles, he proved to be passionate about patient outcomes and was instrumental in monitoring and implementing quality improvement strategies, directing activities for clinical performance, innovation and partner retention.
Dr. Ray graduated from Duke University and then went on to Medical School at University of Texas Southwestern Medical Center at Dallas, and completed a residency in Internal Medicine at Baylor College of Medicine. He earned an MBA from Rice University, MPH from University of Texas Health Science Center Houston and is board-certified by the American Board of Internal Medicine.
Chief Operating Officer
Robert A. Marmerstein joined HCA Houston Healthcare Kingwood as the Chief Operating Officer (COO) in January of 2017. Prior to this appointment, Marmerstein served as COO of HCA Houston Healthcare Mainland. He has held various other progressive leadership roles since joining HCA Healthcare in 2008.
Before transitioning into healthcare, Marmerstein began his career in the hospitality industry, working for Universal Studios and the Hard Rock Hotel at the Universal Orlando Resort in Orlando, Florida.
Marmerstein is a member of the American College of Healthcare Executives and serves on the board of the Greater East Montgomery County Chamber of Commerce. He earned his bachelor’s degree in Hospitality Management from the University of Central Florida and his master's degree in Healthcare Administration from Virginia Commonwealth University.
Until his transition to HCA Houston Healthcare Kingwood, Marmerstein served on the Boards of Directors for the Texas City ISD Foundation for the Future as well as the Jesse Tree Foundation. He previously served in multiple other volunteer and leadership roles with the Roanoke Healthcare Alliance, Bradley Free Clinic, Healthy Roanoke Valley, American Heart Association, United Way of the Roanoke Valley, and the HCA Hope Fund.
Chief Financial Officer
Virgil Winslow joined HCA Houston Healthcare Kingwood as the Chief Financial Officer (CFO) in May 2016. Previously, he served as the CFO at Texas Orthopedic Hospital from 2014 - 2016. Winslow entered the position of Controller in 2010 at HCA Houston Healthcare Clear Lake before assuming the role of Assistant Chief Financial Officer where he fulfilled the duties of the Financial Officer on-site at the HCA Houston Healthcare Mainland campus.
Winslow began his 16-year history with HCA Healthcare in February 2000 as Staff Accountant at Capital Medical Center in Olympia, WA. While at Capital Medical Center, he was promoted to Assistant Controller within 3 months of employment and eventually took on the role of Controller. In September 2005, Winslow and his family made the move to the Houston area where he was offered the Controller position at Spring Branch Medical Center.
Winslow graduated from South Puget Sound Community College in Olympia, WA where he earned his Associates in Technical Arts degree in Computer Programming. He then went on to receive his Bachelor of Science degree in Accounting from the University of Tampa in Tampa, FL.
Patty Howard, RN
Chief Nursing Officer
Patty Howard, RN joined the leadership team in the role of Chief Nursing Officer (CNO) in December 2019. As a CNO, Patty is responsible for overseeing and coordinating each nursing department and its daily operations, but she is truly most passionate about helping her nurses develop their leadership skills.
Howard began her nursing career in 1998 as a medical-surgical nurse at HCA Houston Healthcare Southeast. In 2005, Patty accepted an opportunity to explore a new clinical area and expand her experience with cardiovascular recovery at St. Luke's Hospital in the Texas Medical Center, while also continuing working with HCA Houston Healthcare as an agency critical care nurse. A year later, she accepted a full-time critical care RN role at HCA Houston Healthcare Mainland.
In 2008, Patty's leadership responsibilities were further expanded when she was promoted to critical care director at HCA Houston Mainland, while simultaneously serving as the hospital's interim director of the emergency department. She then assumed the role as the hospital's emergency department director, as well as the leader for additional clinical areas.
In 2014, Howard was selected as the Associate CNO at HCA Houston Clear Lake and continued on to serve as the CNO at HCA Houston Mainland and HCA Houston Conroe.
Howard earned her Associate's Degree in Nursing from San Jacinto College Central and her Bachelor of Science in Nursing from the University of Texas Medical Branch at Galveston. Following receiving her MSN in Leadership & Management from the Western Governors University, she was accepted to the HCA Executive Development Program.