Leadership Team at Carondelet Hospitals

Guiding Us into the Future

Meet the people who are proudly leading Carondelet Health Network in our commitment to delivering high-quality health and wellness to the community. These leaders strive for excellence, innovation and accountability in all areas of care.

Carondelet Health Network Market Chief Executive Officer

Monica Vargas

Monica C. Vargas-Mahar, FACHE, is the market chief executive officer of Carondelet Health Network and the chief executive officer for St. Joseph's Hospital. A seasoned hospital executive, she has more than 20 years of experience in healthcare administration and served in multiple leadership positions. Prior to joining Carondelet, she was chief executive officer of The Hospitals of Providence East Campus and market chief operating officer of The Hospitals of Providence in El Paso, Texas.

Vargas-Mahar is chair of the National Association of Latino Healthcare Executives and was appointed by The American Hospital Association to its Carolyn Boone Lewis Equity of Care Award Committee. She also serves on the board for Trinity University Healthcare Administration Program, Association of University Programs in Health Administration (AUPHA) and Loretto Catholic High School, and is former chair of the United Way of El Paso.

She earned her master’s degree in Healthcare Administration from Trinity University in San Antonio, Texas, and bachelor’s degree in Business Administration from Loyola Marymount University in Los Angeles, Calif.


St. Mary's Hospital Chief Executive Officer

David Ziolkowski is the chief executive officer of St. Mary's Hospital. He has more than 25 years of experience in healthcare administration. Previously, he served as Chief Executive Officer of Person Memorial Hospital in Roxboro, NC. David’s extensive experience includes improving patient satisfaction, increasing employee engagement, and enhancing overall hospital performance while driving strategic growth. He has a long-standing track record of demonstrating commitment to the organizations and communities he has served. He holds a Masters in Healthcare Administration from the University of Minnesota in Minneapolis, MN and a Bachelor’s of Science in Accounting from Marquette University in Milwaukee, WI.

St. Joseph’s Hospital Chief Operating Officer

Ryan Harper is chief operating officer at St. Joseph’s Hospital. He was previously COO at St. Mary’s Hospital, and prior to joining Carondelet, he was chief strategy officer at Abrazo Scottsdale Campus in Phoenix, and served as manager of Government Relations for Tenet's Arizona Group, which includes Abrazo Health and Carondelet Health Network. Harper holds an undergraduate degree from the University of Arizona and a graduate degree from Duke University.

St. Joseph's Hospital Chief Financial Officer

Cristian Cormier is the chief financial officer at St. Joseph’s Hospital. Before joining Carondelet, she served as the Chief Financial Officer for The Hospitals of Providence Sierra Campus in El Paso, TX. Prior to that, she was the Assistant Chief Financial Officer at HCA Houston Healthcare – Northwest and served as Interim Assistant Chief Financial Officer for HCA Houston Health – West. She holds a Bachelor's and Master of Business Administration from Belhaven University, as well as a Master of Accounting and Financial Management from Keller Graduate School.

St. Mary’s Hospital Chief Nursing Officer

Lynn Watson, RN is St. Mary’s Hospital Chief Nursing Officer. She has more than 20 years of experience and served as CNO and vice president of patient care services at Saint Joseph’s Medical Center in Illinois prior to joining Carondelet. Watson holds a Bachelor’s in Nursing from Illinois State University-Mennonite College of Nursing and a Master’s degree in Nursing Education and Administration from the University of Phoenix.

St. Joseph’s Hospital Chief Nursing Officer

Dan Shearn, RN, MSN, is Chief Nursing Officer at Carondelet St. Joseph’s Hospital. He has more than 20 years’ experience as CNO for hospitals in Florida and Pennsylvania before joining Carondelet. Shearn holds a Master’s Degree in Nursing Administration from the University of Pittsburgh, a Bachelor of Science in Nursing from Carlow College and an Associates in Nursing from Community College of Allegheny County.

Carondelet Health Network Chief Strategy Officer

Megan Powe is the market chief strategy officer. She most recently served as chief strategy officer for The Hospitals of Providence Sierra Campus in El Paso, Texas, where she has served in multiple leadership roles within Business Development and Strategy. Megan successfully led the strategic development and growth of key service lines resulting in expanded services, certifications, and performance in Cardiology, Orthopedics and Neurosciences. She holds a Bachelor of Science in Business Administration from Spring Hill College and a Master of Science in Health Care Administration from Trinity University.

Carondelet Health Network Market Chief Medical Officer

Dr. Brian Hess is the market chief medical officer. An Emergency Medicine physician, he is also TeamHealth Regional Medical Director, West Group. He has served as hospital chief of staff at Abrazo Central Campus and Abrazo Arizona Heart Hospital, and chaired committees of performance improvement and patient safety. A graduate of the St. Louis University School of Medicine, Dr. Hess also holds an MBA from the Haslam College of Business at the University of Tennessee.

Holy Cross Hospital

Dina Rojas-Sanchez
Chief Administrative Officer/COO

Dina is the Chief Administrative Officer/COO for Holy Cross Hospital in Nogales. She joined Carondelet in April 1994. She has served in many capacities leading the various departments of strategic planning, community relations, media relations and marketing. She has served as the lead of all ancillary departments overseeing the operations of facilities, environmental services, dietary services, business office, security and biomedical. Dina holds a Bachelor of Science degree in Communications from the University of Arizona and a Master’s degree in Multicultural Education from Northern Arizona University.