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Executive Leadership

Meet our Dignity Health Arizona team.


Tim Bricker, MHSA

President, CommonSpirit Health Southwest Division

Tim Bricker

Tim Bricker is the President of CommonSpirit Health's Southwest Division, which is comprised of Dignity Health hospitals and facilities throughout Arizona and Nevada.

Tim previously served as Senior Vice President and Chief Executive of MultiCare Health System - South Sound Region in Tacoma, Wash., and as a health care consultant for McKinsey and Company. Tim was president of Dignity Health Chandler Regional and Mercy Gilbert Medical Centers from January 2011 to April 2017.

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

Brian Tiffany

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.

Eric Sorensen

Interim Chief Financial Officer, CommonSpirit Health Southwest Division

Eric Sorensen

Eric Sorensen is the Interim Chief Financial Officer for Dignity Health in Arizona and Nevada, the Southwest Division of CommonSpirit Health. Eric is also the Chief Financial Officer for Dignity Health East Valley, which includes Chandler Regional Medical Center and Mercy Gilbert Medical Center.

Eric oversees the finance and decision support functions with a matrixed relationship with the corporate office for general accounting, payroll and accounts payable. He is also responsible for maintaining the relationship with Optum360 East Valley revenue cycle.

Eric received his Bachelor of Science in Health Care Administration and Master of Business Administration from the University of Arizona. He is also a Certified Public Accountant.

Kathleen Rondeau

Chief Strategy Officer, CommonSpirit Health Southwest Division

Kathleen Rondeau

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.

Bradley Pristelski

Chief Information Officer, CommonSpirit Health Southwest Division

Bradley Pristelski

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.

Shirley Gunther

Vice President of External Affairs, CommonSpirit Health, Arizona

Shirley Gunther

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.