Meet our Dignity Health Arizona team.
Tim Bricker, MHSA
Interim President, CommonSpirit Health Southwest Division
Tim Bricker oversees Dignity Health’s Southwest Division as interim president. He previously served as president of Dignity Health Chandler Regional and Mercy Gilbert Medical Centers from January 2011 to April 2017.
Tim left Dignity Health to become Senior Vice President and Chief Executive of MultiCare Health System - South Sound Region in Tacoma, Wash. He most recently consulted for a number of health care ventures and for McKinsey and Company.
Tim has nearly 30 years of health care leadership experience, working for systems throughout the western United States, including Intermountain Healthcare, St. Charles Health System, and ECG Management Consultants. He has a master’s of health services administration from University of Michigan and a bachelor of arts in public and international affairs from Princeton University.
Brian Tiffany, MD, PhD
Chief Physician Officer, CommonSpirit Health Southwest Division
Dr. Brian Tiffany is the Chief Physician Executive for the Dignity Health Southwest Division. He advances clinical excellence, performance, and alignment throughout Arizona and Nevada by building strong physician relationships and engagement, enhancing care delivery and contributing to growth initiatives.
Dr. Tiffany has been a valuable member of the Dignity Health team for many years. He most recently served as Chief Medical Officer of Dignity Health Arizona General Hospital, overseeing clinical operations for both Laveen and Mesa campuses and their hospital satellite emergency departments.
He is a member of the Dignity Health Chandler Regional and Mercy Gilbert Medical Centers medical staffs; and is the chairman of the East Valley Regional Institutional Review Board.
Dr. Tiffany has practiced emergency medicine since 1990. He received his doctor of medicine from Washington University School of Medicine and his doctor of philosophy from Wayne State University.
Robin Shepherd, RN, MSN
Chief Nursing Executive Officer, CommonSpirit Health Southwest Division
Robin Shepherd is the Chief Nursing Executive Officer for Dignity Health Arizona and Nevada. She drives safety, care excellence and experience excellence through servant leadership, clinical innovation, human-centered design, and accountable interdisciplinary collaboration.
Shepherd is responsible for the practice of nursing across 11 acute care hospitals, four neighborhood hospitals and numerous free-standing emergency departments, urgent cares, and clinics in Arizona and Nevada. Serving as the operations leader for Dignity Health Arizona’s “Acute Care at Home” efforts, she has supported development of legislation, health policy and practice to advance virtually integrated care within Dignity Health including provision of inpatient level hospital services provided safely, effectively, and efficiently within the comfort of a patient’s home.
Shepherd holds an Associate Degree in nursing, a Bachelor of Science in nursing, and a Master of Science in nursing with nursing leadership specialty. She is currently completing her Doctorate of Nursing Practice.
For Shepherd, Hello Humankindness is not just a slogan, but a way of serving the world.
Chief Financial Officer, CommonSpirit Health, Arizona
Eric Sorensen is the Chief Financial Officer for Dignity Health East Valley, which includes Chandler Regional Medical Center (CRMC), Mercy Gilbert Medical Center (MGMC) and the Dignity Health East Valley Foundation.
Sorensen oversees the Finance and Decision Support functions with a matrixed relationship with the corporate office for General Accounting, Payroll and A/P. He is also responsible for maintaining the relationship with Optum360 over all of the revenue cycle functions of the East Valley.
Sorensen received his BS in Health Care Administration as well as his Master of Business Administration from the University of Arizona. He is also a Certified Public Accountant.
Chief Strategy Officer, CommonSpirit Health Southwest Division
Kathleen “Kat” Rondeau is Chief Strategy Officer for Common Spirit Health South West Division. She is responsible for strategic planning and management to enhance division growth and access to care throughout the states.
Rondeau leads efforts to create and sustain an integrated delivery system across the continuum of care while evaluating and facilitating growth opportunities including mergers, acquisitions and joint venture opportunities. She ensures positive stakeholder relations and develops and plans service lines.
Across the Southwest division, Rondeau oversees the strategy, business development, marketing, communications and sales efforts.
Rondeau has a master’s of business administration from Capella University and a bachelor’s of science in dietetics from the University of Wisconsin where she completed her dietetic internship at the Cleveland Foundation in Cleveland, Ohio. She is also a Fellow with the American College of Healthcare Executives.
Chief Information Officer, CommonSpirit Health Southwest Division
Bradley Pristelski is the Vice President and Chief Information Officer for the Southwest Division which includes Dignity Health hospitals and clinical affiliates across Nevada and Arizona. He has been with CommonSpirit Health for 15 years. Prior to joining CommonSpirit Health, Pristelski dedicated 12 years in the United States Air Force as a contingency combat operations officer throughout Europe, Asia, the Middle East, and Africa serving in Operations Enduring Freedom and Iraqi Freedom.
Pristelski is dedicated to advancing digital and information technology prowess to ensure market competitiveness and advanced capability as well as shape and grow divisional technical talent. His passion focuses on a foundation of leadership designed around a collection of themed critical behaviors that increase or enhance a leader’s impact across everyday situations and contexts, influence team success and organizational development, produce loyal followership and achieve exceptional results.
Pristelski also has the privilege to serve on the Arizona General Hospital Board of Directors and is an adjunct professor at Arizona State University focused on leadership, mindfulness, and community excellence in partnership with ASU’s Chief of Wellbeing.
Vice President of External Affairs, CommonSpirit Health, Arizona
Shirley Gunther serves as the Vice President of External Affairs for Dignity Health Arizona, Southwest Division.
She has more than 20 years of experience in public policy development, intergovernmental affairs, advocacy, and community relations both in the public and private sectors.
Today, Shirley leads Dignity Health in Arizona’s federal, state and local government External Affairs division, advocating in support of Dignity Health’s mission and strategic plan. As a trusted senior adviser within the organization, she assists in advising and navigating the constantly changing legal and regulatory requirements.
Shirley is a graduate of Arizona State University where she earned her Bachelor of Arts Degree, a Master of Public Administration, and holds a Certification in Public Management.
Chief Human Resources Officer, CommonSpirit Health, Arizona
Maureen Sterbach is the Chief Human Resources Officer for Dignity Health, Arizona. She is responsible for talent acquisition, workforce development, employee health and welfare, and workforce engagement. She brings broad skills in human resources operations, organization development and employee relations.
Sterbach received her lifetime certification for Senior Professional in Human Resources and is a certified Master Trainer in Development Dimensions International. She is a faculty member of Dignity Health's Business Academy, teaching Human Resources and Labor Relations curriculum. Maureen received her Bachelor of Science in Accounting from Gannon University in Pennsylvania.