Troy A. Villarreal, FACHE
As president of HCA Healthcare’s Gulf Coast Division and HCA Houston Healthcare, Troy A. Villarreal is responsible for the management and operations of hospitals, emergency and surgical centers, and diagnostic facilities from Conroe to Texas City, as well as Houston to Corpus Christi and south Texas.
He was appointed to his current position in July 2016 after serving as chief executive officer of Medical City Dallas Hospital and chief executive officer at The Medical Center of Plano, both part of the HCA Healthcare system.
As president of HCA Healthcare’s Gulf Coast Division and HCA Houston Healthcare, Villarreal has been responsible for major facility upgrades, significant growth, and increased patient, physician and employee satisfaction at numerous HCA Healthcare hospitals.
He earned his bachelor’s degree in psychology from Texas A&M University and master’s degrees in healthcare administration and business administration from the University of Houston-Clear Lake. He is a fellow in the American College of Healthcare Executives and serves on the UHCL Healthcare Administration Executive Advisory Board, the Texas Hospital Association’s Council on Policy Development Board and the Greater Houston Partnership Board.
Villarreal is a graduate of Leadership Plano Class 27, having served on the organization’s executive committee board, strategic planning committee and alumni committee. He also served as campaign cabinet chair for the Plano Chamber of Commerce and as an advisory board member of the United Way of Greater Dallas.
Evan Ray, FACHE
Executive Vice President And Chief Administrative Officer
Evan Ray, FACHE has served as the executive vice president and chief administrative officer at HCA Healthcare’s Gulf Coast Division and HCA Houston Healthcare since April 2019. In his role, Ray focuses on expanding HCA Houston Healthcare’s service footprint with an integrated approach to network access, regional outreach, hospital operations and strategic planning. His scope of responsibility supports quality, service, and growth goals spanning eight hospitals, emergency services, human resources, marketing, planning, and rural outreach.
Before coming to HCA Houston Healthcare, Ray served as president of St. Vincent’s Birmingham and St. Vincent’s Chilton hospitals, a division of Ascension Health, in Birmingham, Alabama. In this position, he integrated and aligned physician enterprises, expanded care delivery centers, enhanced programs and provided oversight to all essential access points throughout the St. Vincent’s health system. His leadership expanded multiple service lines, improved patient care, strengthened physician engagement and enhanced emergency services.
Ray began his career at St. Vincent’s Health System in 2012, serving as President of St. Vincent’s Blount and St. Vincent’s St. Clair hospitals. He launched several multi-campus hospital and service line expansions, developing physician alignment initiatives that enabled the expansion of quality offerings for the community.
Prior to joining St. Vincent’s Health System and Ascension Health, Ray served in Hospital Executive Leadership roles from 2005 – 2012 in Alabama, Iowa & South Carolina.
Ray earned a bachelor’s degree in finance and economics from Mississippi State University, as well as master’s degrees in business administration and health administration from The University of Alabama at Birmingham. As associate member and fellow of the American College of Healthcare Executives, Ray’s accomplishments have been recognized by the Birmingham Business Journal as a “Birmingham Healthcare Leader to Know” from 2012-2018. He was also an esteemed member of the Birmingham Business Journal's 2016 "Top 40 under 40."
Jeffery L. Silwinski
Chief Financial Officer
Jeffery L. Sliwinski was appointed CFO in May 2012. Previously, he served as CFO of HCA Houston Healthcare Clear Lake and HCA Houston Mainland, a campus of HCA Houston Clear Lake.
Sliwinski has held various financial roles in healthcare, having served as CFO at The Woman’s Hospital of Texas and controller of the HCA Healthcare’s Gulf Coast Division. His prior experience also includes financial positions at Baptist Memorial Healthcare System in Memphis, Tennessee and The Children’s Hospital of Buffalo, New York.
Sliwinski earned a bachelor’s degree in business administration with a concentration in accounting from the State University of New York at Buffalo. He serves on the Northern Brazoria County Education Alliance Board of Directors and is treasurer of the Pearland Independent School District Booster Club.
Mujtaba Ali-Khan, D.O.
Chief Medical Officer
Mujtaba Ali-Khan, D.O. was named the Chief Medical Officer for HCA Houston Healthcare and HCA Gulf Coast Division in January 2020. In this role, Ali-Khan assumes oversight for clinical quality, safety, and high reliability across HCA Gulf Coast Division’s 16 hospitals. He works to advance our uncompromising commitment to quality care, patient safety, medical technology and developing programs that further cultivate quality improvement.
Previously, Ali-Khan served as the Associate Chief Medical Officer where he assisted with quality and patient safety agenda. He had primary responsibilities of HCA Healthcare Kingwood, North Cypress and Tomball with key personnel handling day-to-day operations.
Ali-Kahn joined the Gulf Coast Division in 2016 as HCA Houston Healthcare Conroe’s chief medical officer and later that year assumed the chief medical responsibilities of HCA Houston Healthcare Kingwood.
Additionally, Ali-Khan previously served as vice president of Hospital DOCs, a medical practice offering hospitalist services to several regional hospitals. He also served as president of Streamlined Medical Solutions, a leading healthcare technology solutions provider. In these roles, Ali-Khan was instrumental in the development of DASH (Direct Admit System for Hospitals), a software solution that re-imagined the patient direct admission process, for which he obtained a patent. The software has since been adopted by hundreds of medical facilities.
After earning a bachelor’s degree in medical science from the University of Maryland, Ali-Khan completed his doctorate in osteopathic medicine training at NOVA Southeastern College of Osteopathic Medicine, followed by an internal medicine residency at the University of Miami – Jackson Memorial Hospital. Board certified by the American Board of Internal Medicine, Ali-Khan has practiced in a traditional internal medicine practice setting and as a hospitalist, earning the distinction of serving as a National Health Service Corps scholar.
Kelli Nations, MHA, BSN, RN, NE-BC
Chief Nurse Executive
In 2016, Kelli Nations was named the first CNE in HCA Healthcare's Gulf Coast Division and HCA Houston Healthcare.
In this capacity, Nations is responsible for nurse and physician collaboration and service initiatives including patient experience, nursing recruitment and retention, and nursing management development.
For 14 years, she served as a nursing leader at HCA Houston Healthcare Clear Lake, Conroe, Southeast, and Mainland.
Nations holds both a bachelor’s degree in nursing and a master’s degree in healthcare administration from Texas Woman’s University in Houston. She is certified through the American Nurses Credentialing Center as a Certified Nursing Executive, Advanced and is currently pursuing a doctorate in business administration with leadership development from Northcentral University, a doctoral research institution.
Jose A. Perez Jr., M.D.
Vice President of Graduate Medical Education
As vice president of Graduate Medical Education, Dr. Jose A. Perez, Jr. focuses on strategy and development for HCA Houston Healthcare.
Prior to joining HCA Healthcare's Gulf Coast Division in March 2018, Perez served as vice chair of education and internal medicine residency director for programs associated with Houston Methodist Hospital’s Weill Cornell School of Medicine.
He has more than 25 years of experience in medical education in addition to his time in clinical practice as an internist.
Perez is a fellow of the American College of Physicians and the American Board of Quality Assurance and Utilization Review physicians. He also is a diplomat of the American Association for Physician Leadership and the former president of the Texas chapter of the American College of Physicians and the Hispanic American Medical Association of Houston.
Perez graduated from the Universidad de Monterrey Medical School in Mexico before completing additional clinical training at New York Medical College and a residency in internal medicine at Waterbury Hospital, affiliated with Yale University School of Medicine, and at Kern Medical Center in Bakersfield, California where he also served as chief resident.
He holds a master’s degree in medical education from the University of Southern California and a MBA from the University of Massachusetts, Amherst.
Mauricio Camargo, MBA, MS
Senior Vice President of Planning and Business Intelligence
Mauricio Camargo, MBA, MS, was appointed senior vice president of planning and business intelligence for HCA Gulf Coast Division in September 2016.
Camargo leads the strategic growth of the division including physician partnerships, service line development, regional outreach, and other efforts to improve health care programs in the communities served by HCA Gulf Coast Division and HCA Houston Healthcare.
Previously, Camargo was an engagement manager at the Houston office of McKinsey & Company, a management consulting firm that provides strategic and operational counsel to top management of global corporations and institutions. He started his career at McKinsey & Company as a business analyst, later becoming an associate and senior associate. Camargo also completed stints at Novartis, a multinational biopharmaceutical company, and Biomerieux, a biotechnology and diagnostics multinational corporation.
Camargo graduated magna cum laude from Brandeis University with bachelor’s degrees in physics, biological physics and economics. He went on to earn a master’s in business administration from Harvard Business School, where he completed independent research on trends and opportunities in the medical device industry and evaluated the market potential for early-stage medical devices. He completed his education by receiving a master of science in health sciences and technology at the Massachusetts Institute of Technology and the Harvard-MIT Division of Health Sciences and Technology.