John Walker

Chief Executive Officer

John Walker

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.


Ken Stevens

Chief Operating Officer

Allen Marsh

Ken Stevens joined Medical City Lewisville as chief operating officer in June 2023.

As COO, Stevens provides leadership and direct administrative oversight of strategic planning for business development and project management resulting in service growth, improvements in patient outcomes and advanced patient and physician satisfaction.

A proven leader, Stevens served previously as vice president of operations at Medical City Frisco since 2020. There he provided operational oversight of ancillary functions, construction and real estate, which included the build and opening of a $91 million patient tower in 2022. Stevens also oversaw many of the hospital’s services including cardiology, general surgery/colorectal and bariatric services, among others. Stevens began his career with Medical City Healthcare in 2011 as a financial analyst at Medical City Arlington before a return to supply chain and operations.

Stevens holds a Master of Health Care Administration from The University of Texas at Arlington and a Bachelor of Arts in Economics from Texas Tech University.


Whitney Bendel

Chief Financial Officer

Whitney Bendel

Whitney Bendel joined Medical City Lewisville as chief financial officer in October 2022.

Prior to this role, Bendel served as vice president of finance at Medical City Dallas where her strong financial acumen, steady leadership, and dedication to strategic growth contributed to facility-wide enhancements. During her tenure, she was instrumental in building processes to track volume, revenue and financials in support of the campuses’ growth agenda.

Bendel began her career at HCA Healthcare in 2008 with Parallon Patient Account Services as a financial analyst. She has served in progressive leadership roles at Medical City Plano and Medical City Frisco.

Bendel holds a Master of Business Administration from Dallas Baptist University and a Bachelor of Business Administration from Texas Tech University. She is a 2018 graduate of the HCA Emerging Leaders program and a 2022 graduate of the HCA Executive Development program.


Emily Sneed

Chief Nursing Officer

Emily Sneed

Emily Sneed, MSN, RN, PCCN, NEA-BC, was named chief nursing officer (CNO) for Medical City Lewisville in November 2023. In this role, Sneed oversees the nursing practice and operations for all facility nurses and ancillary care services.

Prior to this role, Sneed served as ACNO of Medical City Plano since June 2022. She began her HCA Healthcare career as a registered nurse at Medical City Plano in 2009. She has served in progressive leadership roles, including nurse educator, assistant nurse manager, nurse manager and nurse director.

Sneed earned a Master of Science in Nursing from Grand Canyon University and a Bachelor of Science in Nursing from Missouri State University. She has been awarded the D Magazine Excellence in Nursing Award and recognized as a DFW Great 100 Nurse.


Dara Biegert

Vice President of Human Resources

Dara Biegert

Dara Biegert is the Human Resources Vice President at Medical City Lewisville and joined the executive leadership team in 2008.

As Human Resources VP, Biegert oversees all aspects of talent and performance management, recruitment, retention, workforce planning and employee engagement.

Biegert has more than 35 years of human resources experience, and is a graduate from Texas A&M.


Stephanie MacVeigh

Vice President of Quality

Stephanie McVeigh

Stephanie MacVeigh, MSN, RN, CPPS, LSSGB, is the Vice President of Quality at Medical City Lewisville and joined the executive leadership team in 2021.

As Quality VP, MacVeigh has oversight of all aspects of clinical quality outcomes and reporting, patient safety and risk management.

MacVeigh has more than nine years of nursing experience and a strong background in quality and risk management, and has served in similar roles with direct responsibility for quality, infection prevention, risk management and medical staff peer review.

MacVeigh earned a Bachelor of Science in Nursing from the University of Texas at Arlington, and her Master of Science in Nursing Leadership and Management from Western Governors University. She also holds a Master of Liberal Arts from Texas Christian University and a Bachelor of Arts in Journalism from Baylor University. MacVeigh is a registered nurse, a certified patient safety professional, a certified Lean Six Sigma green belt for improvement project methodologies, and a member of the American College of Healthcare Executives.

Outside of the hospital, MacVeigh has served her community as an advisory board member for the Frisco ISD Career & Technology Education Center.


Gary Fullerton

Assistant Vice President of Operations

Gary Fullerton

Gary Fullerton, MBA, RN, FACHE, NEA-BC, CEN, LP, is the Assistant Vice President of Operations at Medical City Lewisville and joined the executive leadership team in 2015.

As Operations AVP, Fullerton oversees service line growth, project management, and administrative and financial direction for perioperative services, facilities, pharmacy, food & nutritional services, laboratory and environmental services.

Fullerton has more than 20 years of emergency services experience in progressive leadership roles at Medical City Healthcare. His clinical experience is in emergency services, where he successful led the teams to achieve accreditations in Chest Pain, Stroke and Trauma. He also led the opening of the first Medical City Healthcare freestanding emergency department with an attached outpatient imaging center in North Texas: Medical City ER Flower Mound.

Fullerton earned his Bachelor of Science in Nursing from the University of Texas Arlington and a master's degree in healthcare business administration from Texas Woman’s University. He is a licensed paramedic, a registered nurse and certified emergency nurse, and a certified nurse executive. He is a member of the American College of Healthcare Executives and the North Texas Organization of Nurse Executives.

Outside of the hospital, Fullerton has served his community on the medical team at Valley Creek Church and as a board member at Grace Place Properties.


Michelle Wildman

Administrative Director of Nursing Operations

Michelle Wildman

Michelle Wildman, MBA-HA, BSN, RN, CCRN, is the Administrative Director of Nursing Operations at Medical City Lewisville and joined the executive leadership team in 2021.

As ADNO, Wildman provides leadership and administrative oversight of clinical operations and quality outcomes for critical care nursing, respiratory services, sleep medicine and Senior Health Clinic.

Wildman has more than 21 years of nursing experience, and has served in progressive leadership roles since 2015 within Medical City Healthcare.

Wildman earned her Bachelor of Science in Nursing at University of Texas at Arlington and her Master of Healthcare Administration and Master of Business Administration from Western Governor’s University. She is currently pursuing her Doctorate of Nurse Practice through Grand Canyon University. Michelle is a registered nurse and certified critical care nurse, a member of the American Organization of Nurse Executives, a 2017 graduate of the HCA Healthcare Emerging Leaders Program, and a 2020 DFW Great 100 Nurse honoree.

Outside of the hospital, Wildman has served her community through Samaritan House, Meals on Wheels, Habitat for Humanity, and Paws for Reflection.