Executive Leadership

Interim President and CEO

COO

Jeff McBee is the interim President and CEO for Dignity Health Chandler Regional Medical Center and Mercy Gilbert Medical Center. He also serves as the Chief Operating Officer (COO) for both East Valley hospitals. 

Prior to his position with Dignity Health, Jeff served as Administrator of Rust Medical Center at Presbyterian Healthcare Services in New Mexico. He previously served in various leadership roles in hospital operations and supply chain at Maricopa Integrated Healthcare System, Phoenix; Parkland Hospital, Dallas, Tex., Duke University Health System, Durham, NC, and Guthrie Healthcare System in Sayre, Pa.

Jeff received his bachelor’s in psychology, master’s of health administration, and master’s of business administration from the University of Missouri-Columbia.

Jeff is a member of the American College of Healthcare Executives.

Chief Medical Officer

Erik Mattison, MD, FACEP is the Chief Medical Officer for Mercy Gilbert Medical Center (MGMC). In 2024, Dr. Mattison joined the executive leadership team.

Since 2004, Dr. Mattison has practiced as an Emergency Medicine physician at Chandler Regional Medical Center (CRMC) and Mercy Gilbert Medical Center. He has served as the Medical Director at CRMC Emergency Department, Department Chairman of the Emergency Department at both CRMC and MGMC and as the President-elect of the Medical Staff for CRMC and MGMC. Dr. Mattison has served on numerous hospital quality and safety committees including serving as chair of the Medical Staff Quality Committee. He is board certified in both Emergency and Addiction Medicine.

Dr. Erik Mattison completed his undergraduate biology degree at the University of Michigan with High Honors. He attended Case Western Reserve Medical School in Cleveland, Ohio. Dr. Mattison then moved to the Southwest for his Emergency Medicine training at Maricopa Medical Center in Phoenix, Arizona. Dr. Mattison served as Chief Resident and received the Outstanding Resident Award (voted by attending physicians) and Residents Award (voted by fellow residents).

Chief Nursing Executive

Her leadership ensures consistent and high-quality standards of patient-centered nursing care - managing all nursing resources; developing nursing policies and programs to comply with established standards, and implementing long-term strategic goals and objectives for the organization.

Meredith has been a Registered Nurse for 22 years, the last 17 with Dignity Health. She joined Chandler Regional Medical Center as a staff nurse in labor and delivery, was promoted to clinical supervisor and left the East Valley to manage St. Joseph’s Hospital and Medical Center’s labor care areas. She returned to Chandler Regional as Director of Maternal Child Health and then she assumed the role of Senior Director of Maternal Children Health for both Chandler Regional and Mercy Gilbert.

Meredith has master’s degrees in nursing and business administration, and is working on her doctorate of nursing practice. She also has a nurse executive board certification through American Nurses Credentialing Center and a graduate certificate in clinical ethics from the Alden March Bioethics Institute. She’s been twice nominated for the Arizona March of Dimes Nurse of the Year and was recognized with Dignity Health’s Acts of Humankindness Awards in 2016 and 2017.

Vice President of Operations

As Vice President of Operations, Brian oversees a variety of clinical and support departments at both Chandler Regional and Mercy Gilbert Medical Centers and serves on strategic and service line growth initiatives including general surgery, neurosurgery and thoracic surgery. Brian also is the executive for major construction projects at both hospitals. Past and current projects include Chandler Regional Medical Center’s Tower D (2021), Graduate Medical Improvements (2023), and the 5th Floor nursing unit, Endoscopy, Hybrid OR and Cath Lab Expansions (2025) and at Mercy Gilbert Medical Center, the Women’s and Children’s Pavilion, a unique partnership between Dignity Health and Phoenix Children’s Hospital slated to open in 2026.

Prior to his current role, Brian served for nearly 11 years as the  Director of Radiology at Chandler Regional Medical Center.  During his tenure, Brian oversaw expansion of imaging services to support the growing center, including the addition of trauma, growth of neurosurgery and  support of the expansion of high risk OB delivery. In addition, Brian worked to expand imaging  capabilities and update current systems to the latest in new technology, adding 3T Digital MRI,  advanced Interventional Radiology and fully digital x-ray imaging. Brian got his start in  healthcare in the US Army as a Radiologic Technologist (Radiology Specialist) and still holds  his registry today. Upon conclusion of service, Brian worked first as a technologist and began progressing through leadership positions to where he is today. Brian holds a Bachelor of Arts in  Management and Organizational Development from Fresno Pacific University and a Master of  Health Administration from the University of Phoenix. 

Chief Financial Officer

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

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.