St. David's HealthCare

St. David's HealthCare is one of the largest health systems in Texas and Austin's third-
largest private employer, with more than 60 sites throughout Central Texas, including
seven hospitals, four urgent care centers, four ambulatory surgery centers, and two
freestanding emergency departments, with a third set to open in Bastrop this summer.

St. David's HealthCare has a long history of serving the residents of Central Texas
with exceptional medical care. Our 7,500 employees touch over 858,000 lives each
year with a spirit of warmth, friendliness and personal pride.

Meet Our Team

Deborah L. Ryle, FACHE

Chief Executive Officer

Deborah L. Ryle, FACHE St. David’s Round Rock Medical Center

Deborah Ryle, FACHE, has served as chief executive officer for St. David’s Round Rock Medical Center since 1996, and has been affiliated with St. David’s HealthCare since 1984. Prior to joining the leadership team in Round Rock, Ryle served as senior vice president for St. David’s Rehabilitation Center and St. David’s Pavilion in Austin.

In establishing St. David’s Round Rock Medical Center as a comprehensive healthcare provider for Williamson County and adjacent areas, Ryle directed capital improvement projects in excess of $100 million and spearheaded the growth of the medical staff to more than 800 physicians representing virtually every medical specialty. An active fundraiser, Ryle has developed programs to support community nonprofit and governmental agencies. Her efforts within St. David’s Round Rock Medical Center have propelled the hospital to a patient satisfaction ranking within the top 2 percent of all HCA facilities.

Ryle is a Fellow of the American College of Healthcare Executives, and holds a bachelor’s degree in communications from The University of Texas at Austin and a master’s degree in healthcare administration from Trinity University.



Tad A. Hatton

Chief Operating Officer

Tad A. Hatton St. David’s Round Rock Medical Center

Tad A. Hatton serves as chief operating officer at St. David’s Round Rock Medical Center. In this role, he oversees Environmental Services, Security, Food and Nutrition Services (FANS), Facilities Management, Imaging Services, Laboratory, Primary Care Services, Rehabilitation and Cardiac Services.

Hatton has an extensive background in healthcare management. Prior to joining the executive team at St. David’s Round Rock Medical Center, he served as chief operating officer at Willow Creek Women’s Hospital in Johnson, Arkansas, which ranks first in that state’s number of annual births. At Willow Creek, Hatton led two construction projects that doubled the hospital’s capacity and created the region’s only Level 3 NICU.

Before relocating to Arkansas, Hatton spent six years in hospital operations in the Dallas area. During the first years of his professional career, he gained valuable experience in the financial industry, specifically in the banking and mutual fund sectors. He holds a bachelor’s degree from Texas A&M University and master’s degree in Business Administration from the University of Texas at Dallas.



Patti Ellisor

Chief Nursing Officer

Patti Ellisor St. David’s Round Rock Medical Center

Patti Ellisor has served as chief nursing officer at St. David’s Round Rock Medical Center since 2008. Her background includes more than 25 years of experience in nursing, encompassing both patient care and administrative positions. Prior to joining the executive team at St. David’s Round Rock Medical Center, Ellisor served as assistant executive director at Scott & White.

Ellisor holds licenses as a Registered Nurse and certifications in Nursing Administration and is a Clinical Nurse Specialist. She is a member of the American College of Healthcare Executives and the Texas Nurses Association.

Ellisor received her bachelor’s degree in nursing from Texas Women’s University, her master’s degree in nursing from The University of Texas at Austin, and a master’s degree in healthcare administration from The University of Mary Hardin-Baylor.



Michelle Hays

Chief Financial Officer

St. David’s Round Rock Medical Center

Michelle Hays is chief financial officer of both St. David’s Round Rock Medical Center and St. David’s Georgetown Hospital. Prior to assuming this role, Hays served for seven years as chief financial officer of Heart Hospital of Austin, during which time she helped lead the hospital through the acquisition by St. David’s HealthCare.

Hays has more than 20 years of combined hospital financial management and public accounting experience. Prior to joining Heart Hospital of Austin, she served as chief financial officer for Louisiana Heart Hospital and also as a regional chief financial officer for a long-term acute care hospital company in the Shreveport and Austin markets. Before entering the healthcare industry, Hays spent five years in public accounting as an auditor.

Hays is actively involved with the American Heart Association. She is a member of the Circle of Red and has served for several years on the executive leadership team for the Heart Ball.

St. David's Round Rock Medical Center
2400 Round Rock Ave.
Round Rock, TX 78681
Telephone: (512) 341-1000
Map & Directions