LaSharndra “Sharn” Barbarin
Chief Executive Officer, Medical City Arlington
LaSharndra “Sharn” Barbarin, MHA, FACHE, is chief executive officer at Medical City Arlington, joining the executive leadership team in 2022.
With more than 20 years of healthcare leadership experience, Barbarin began her career with HCA Healthcare as an administrative fellow at Medical City Las Colinas and was quickly promoted to COO at Medical City McKinney where she served nine years. She was advanced to COO at Medical City Arlington in 2011 before being promoted to CEO at Medical City Lewisville in 2015.
Outside of the hospital, Barbarin has served in community leadership positions including the DFW Hospital Council Board of Trustees, the board of directors for the Lewisville and Flower Mound Chambers of Commerce, Medical City Healthcare Diversity and Inclusion Council, the HCA Healthcare Division Diversity and Inclusion Council and the HCA Healthcare Hope Fund Board, among others.
Barbarin has been honored with multiple awards including the Dallas Business Journal “Minority Business Leader,” “Outstanding Alumni” by Tulane University’s School of Public Health & Tropical Medicine, “Top 25 Women in Business” by McKinney Living, “Young Healthcare Executive of the Year” nominee by the DFW Hospital Council and named a “2022 Women in Business” honoree by the Dallas Business Journal.
Barbarin is a graduate of Louisiana State University and earned a Master of Health Administration from Tulane University. She is a Fellow of the American College of Healthcare Executives.
Ben Coogan
Chief Executive Officer, Medical City Plano
Ben Coogan was named chief executive officer at Medical City Plano with reporting oversight of Medical City Frisco in 2023. Together, both hospitals comprise over 700 acute care beds and 3,000 employees.
Coogan's healthcare career spans nearly two decades, with leadership roles in several Medical City Healthcare facilities. Coogan previously served as CEO of Medical City Fort Worth since 2021, where his leadership contributed to the successful launch of new services including the expansion of solid organ transplant services. He also led more than $30 million facility expansion and capital projects. Prior to joining Medical City Fort Worth, Ben served as chief operating officer at Medical City Dallas, Medical City Children's Hospital and Medical City Arlington.
Coogan holds a Bachelor of Psychology from Texas A&M University and a Master of Business Administration in Health Services Management from the University of North Texas. He is a board member of the American Heart Association and an active member of the American College of Healthcare Executives.
Mark Deno
Chief Executive Officer, Medical City North Hills
Mark Deno, FACHE, joined Medical City Healthcare as CEO of Medical City North Hills in August 2019. Mark has been part of HCA Healthcare since 2014. He previously served as Chief Operating Officer at The Medical Center of Aurora, Colorado.
Mark has a proven record of driving results, supporting growth initiatives, and improving patient outcomes. His career began overseeing surgery centers in Colorado and Texas, including two years as CEO of HealthSouth Rehabilitation Hospital of Arlington.
He received a Bachelor of Science in Business Administration from Colorado Technical University and a Masters of Business Administration from American Intercontinental University.
Jay deVenny
Chief Executive Officer, Medical City Children's Hospital and Medical City Women's Hospital Dallas
Jay deVenny, FACHE, was named chief executive officer of Medical City Children’s Hospital and Medical City Women’s Hospital Dallas in January 2022. Previously, he served as chief development officer and vice president of business development at Medical City Dallas since December 2013. He has led development initiatives of services at Medical City Children’s Hospital including a world-class congenital heart program, pediatric oncology, pediatric orthopedics and trauma. In addition, he supported physician partnerships at Medical City Women’s Hospital Dallas.
Prior to joining Medical City Healthcare, deVenny held several roles in administrative and business development within the North Texas healthcare industry.
deVenny holds a Master of Business Administration in Health Services Management from the University of North Texas and a Bachelor of Science in Communication Studies from the University of Kansas and is a Fellow of the American College of Healthcare Executives (FACHE). He serves as a board member for Camp iHope and the North Dallas Chamber of Commerce.
Steven Edgar
Chief Executive Officer, Medical City Denton
Steven Edgar, FACHE, PT, joined Medical City Denton in July 2016. Edgar came to North Texas from Wesley Woodlawn Hospital, a 99-bed acute care hospital in Wichita, Kansas after serving four years as CEO. During his tenure at Wesley Woodlawn he achieved outstanding patient satisfaction and employee engagement, and expanded service lines including ER, cardiology, and surgical services.
Edgar holds a Bachelor’s Degree in Health Science-Physical Therapy from the University of Missouri, Columbia, and a Master of Public Administration – Health Administration, from University of Missouri, Kansas City. He is a Fellow of the American College of Healthcare Executives.
Sean Kamber
Chief Executive Officer, Medical City Weatherford
In 2018, Sean Kamber was named chief executive officer at Medical City Weatherford. Prior to entering this role, Kamber served as vice president of rural and community outreach for HCA Healthcare’s Gulf Coast Division, identifying and developing strategic opportunities for collaboration in the secondary and tertiary service areas.
In addition, Kamber served as chief operating officer at Weatherford Regional for three years. In which time, he helped improve CMS hospital ratings, increased growth in adjusted admissions and surgery, and completed the joint venture acquisition for the imaging center.
Kamber brings more than 12 years of healthcare experience to the role. His career began as division manager for a urology group and he quickly advanced to higher-level leadership roles, including director of operations at Texas Health Resources and assistant administrator at Laredo Medical Center.
Kamber received a Master of Science in Healthcare Administration from Trinity University and holds an undergraduate degree from the Texas Tech Rawls College of Business.
Krysla Karlix
Chief Executive Officer, Medical City Green Oaks Hospital
Krysla Karlix was named CEO of Medical City Green Oaks in January 2023. In this role, Karlix is responsible for all inpatient and outpatient operations related to Medical City Green Oaks, including the 124-bed inpatient hospital serving adolescents (12 and above) and adults, two outpatient clinics located in Dallas and Plano, 24-hour psychiatric crisis stabilization services and telepsychiatry services across the Medical City Healthcare system of care.
A leader and administrator in North Texas behavioral healthcare for over two decades, Karlix joined the executive team at Medical City Green Oaks as chief operating officer in December 2016. She was responsible for the operations of the inpatient unit and provided oversight of growth projects including the expansion of the ECT suite, the addition of telehealth as an option for all outpatient services and the expansion of telepsychiatry to every Medical City Healthcare hospital.
Karlix is an active volunteer with the National Alliance on Mental Illness (NAMI). She earned a Master of Science in Social Work from the University of Texas at Arlington and a Bachelor of Science in Psychology from Texas A&M University.
Ernest Lynch
Chief Executive Officer, Medical City McKinney
Ernest Lynch was named to his current post in 2002. Prior to that, his leadership served other HCA affiliates in the roles of chief operating officer at Medical City Plano, chief executive officer at Medical Center of Lancaster, and chief operating officer at Longview Regional Medical Center.
He brings over 28 years of experience in healthcare administration to his position. During his career he has served in various capacities both in for-profit and not-for-profit settings. In addition, his experience ranges from large tertiary systems to small community facilities.
Prior to joining HCA in 1996, Lynch served the Lubbock Methodist Hospital System. During his 10-year tenure, he served in capacities ranging from administrative resident to senior vice president.
Chris Mowan
Chief Executive Officer, Medical City Dallas
Chris Mowan, MBA, FACHE, joined Medical City Healthcare from Las Vegas, Nevada, where he has served three years as CEO of MountainView Hospital, a complex teaching hospital. During his tenure at MountainView, he oversaw a $90-million facility expansion, achieved unprecedented ER growth and launched graduate medical education programs.
Mowan’s career with HCA spans more than 20 years, starting with roots as an HCA manager to roles as COO at Del Sol Medical Center in El Paso and as COO at Sunrise Medical Center and Children’s Hospital in Las Vegas, which was ranked as the #1 facility in Nevada by U.S. News & World Report under his leadership. In North Texas, Mowan was instrumental in developing the intern and resident teaching program at Medical City Fort Worth, which continues to develop physicians today.
Mowan is a graduate of Indiana University and holds a Master’s degree in Business Administration from Southern Methodist University. He is a Fellow of the American College of Healthcare Executives.
Jessica O’Neal
Chief Executive Officer, Medical City Las Colinas
Jessica O’Neal, MHA, FACHE, was named chief executive officer of Medical City Las Colinas in January 2022.
Prior to this role, O’Neal served as the CEO of Medical City Children’s Hospital and Medical City Women’s Hospital Dallas since 2018. There, she led all programs related to women’s and children’s services, launching and expanding world-class congenital heart and fetal surgery programs, among her many accomplishments. During her tenure, the facilities achieved Level IV Maternal and Level IV NICU designations, the highest level of care available for women and critically ill babies.
Prior to Medical City Healthcare, O’Neal served as the chief operating officer of HCA Healthcare’s West Florida Hospital in Pensacola, Florida. There, she launched a wide spectrum of pediatric services including orthopedics, cardiology, pulmonology, ENT, GI, urology and imaging services.
O’Neal earned a Master of Science in Health Care Administration from Trinity University and a Bachelor of Science in Dietetics from Texas Christian University. She serves on the board of directors for the Dallas-Fort Worth Hospital Council and Community Partners of Dallas.
Patrick Rohan
Chief Executive Officer, Medical City Frisco
Patrick Rohan joined the Medical City Frisco senior leadership team as Chief Operating Officer in February 2017.
He came to North Texas from HCA’s Plantation General Hospital in Plantation, Fla., where he had served as COO since 2013. While there, he helped develop plans for a new, $256 million hospital, and oversaw a 12-bed expansion of Plantation’s Emergency Department.
Patrick also made a significant contribution to the growth of Plantation's robotic surgery program, developed Ebola and Zika emergency-response teams and protocols, and established an intensive outpatient program in behavioral health for Broward County.
Earlier in his career, Patrick worked at several other HCA hospitals in South Florida, including Kendall Regional Medical in Miami, JFK Medical Center in Atlantis, and Columbia Hospital in West Palm Beach.
He holds bachelor's and master's degrees in Business Management from Florida Atlantic University in Boca Raton, Fla. In his leisure time, Patrick enjoys running, fishing, playing golf, and trying new restaurants and cuisines.
John Walker
Chief Executive Officer, Medical City Lewisville
John Walker, ACHE, joined Medical City Lewisville as chief executive officer in October 2022.
Prior to this role, Walker served as chief operating officer at Medical City Denton where his steady leadership, focus on exceptional quality, dedication to physician collaboration and colleague support, and vision for strategic growth contributed to facility-wide enhancements. During his tenure, the Level II Trauma Center earned recognition for outstanding patient care and quality, including a Leapfrog Group “A” safety rating.
Walker began his career with Medical City Healthcare in 2011 as an administrative resident at Medical City McKinney and served in progressive leadership roles at Medical City McKinney and Medical City Dallas.
He holds a Master of Science in Healthcare Administration from Trinity University, along with a Master of Business Administration degree with an emphasis in finance, and a Bachelor of Business Administration degree in finance from Texas Tech University.
Walker is a member of the American College of Healthcare Executives and a 2013 inductee to the Garland Sports Hall of Fame for tennis.
Glenn Wallace
Chief Executive Officer, Medical City Alliance
Glenn Wallace, CPA, assumed his leadership role at Medical City Alliance in January 2014. He brings more than more than 25 years of experience in the healthcare field, and has served HCA in financial positions at several other locations.
He came to Alliance from Medical City Plano, where he was the chief operating officer. Prior to that, he served as the chief financial officer and chief operating officer at Medical City North Hills. He also was the chief financial officer at Medical City Las Colinas and controller at Plaza Medical Center and Medical City Arlington.
Throughout his career with HCA, Wallace has overseen significant hospital growth including opening Medical City Las Colinas and overseeing major expansion projects at both Medical City Plano and Medical City North Hills.
Wallace earned his bachelor’s degree in business administration from Stephen F. Austin State University and his master’s degree in business administration from Texas Christian University.