Executive Leadership

Executive Leadership

Executive Leadership

Jason Lohr

Chief Executive Officer


Dr. Jason Lohr is passionate about service, both locally and globally. Jason graduated from Loma Linda University School of Medicine in 2001 and then completed his Family Medicine residency at Florida Hospital in Orlando, Florida. After residency, Jason spent 7 years internationally working in Nigeria and Honduras, serving multiple roles including core faculty, medical director, and starting two American Heart Association Training Centers, one in each country. After returning to the US, Jason has worked as a faculty member with the Loma Linda University Family Medicine Residency program at SAC Health System and served as Director of Clinical Operations, Chief Medical Officer, and now Chief Executive Officer. Jason has a certificate in Tropical and Travel Medicine (CTropMed), has a passion for global health, and continues to serve overseas 4 weeks each year covering physicians who are taking their vacation. Jason has also earned a Fellow of the American College of Healthcare Executives, FACHE credential, which shows his commitment and dedication to healthcare leadership.

Bonnie I. Chi-Lum

Chief Medical Officer


Dr. Chi-Lum graduated from Loma Linda University School of Medicine in 1991 and completed a residency in Preventive Medicine along with a Masters in Health Administration. She also completed a fellowship in medical journalism at the Journal of the American Medical Association. She has worked for American Medical Association, Kaiser Permanente, Loma Linda University Health, and in private practice. In addition to clinical work, she has also been a course director-associate professor for over two decades at Loma Linda University School of Medicine. She is passionate about the work and opportunities she has at SAC Health System and works tirelessly to meet its Mission of providing the best care for patients while sharing the love of Jesus.

Maryellen Westerberg

Chief Operating Officer


Dr. Maryellen Westerberg serves as the Chief Operating Officer at SAC Health System. She received her Doctorate in Public Health from Loma Linda University with an emphasis on nutrition and health behavior change. Following graduation, she worked at Kaiser Permanente, Fontana as a Preventive Care Specialist specializing in diabetes care and education. Prior to her current appointment as COO, Dr. Westerberg served as Executive Director of the Health, Behavior and Wellness Center at SAC Health System, which includes the integration of behavioral health, health education and community resources into, clinical and community care. For the past seventeen years, Dr. Westerberg has served in multiple roles with SAC Health System as well as Loma Linda University and Medical Center as an administrator, provider and faculty. Her passion has led her to cultivated partnerships within the community to connect patients to needed resources.

John Skelton

Chief Financial Officer


Mr. John Skelton serves as the Chief Financial Officer. He is a Certified Fraud Examiner in Healthcare/Loss Prevention and received a Bachelor of Science degree in Accounting and MBA program from Minnesota State University; he is a member of the Healthcare Financial Management Association and a member of Association of Certified Fraud Examiners. His previous positions held include Chief Financial Officer, Controller and Director of Reimbursement and Administration for Acute Care providers and Behavioral Healthcare provider in Los Angeles area.

Gerrard Gier

Chief Information Officer

Gerrard has a Master of Science in Information Systems and is known for IT transformation. He is an innovative leader who has enjoyed his previous roles within IT, Cloud Services, and Security at IBM, Washington Mutual, Toyota Motor Services, St. Joseph Health, VNA California and United Healthcare Workers West.

His experience with EMR, ICD-10 and HR systems makes him a great fit for SACHS. Gerrard is a firm believer of treating everyone with dignity and respect, which he attributes from being born and raised in Hawaii.

He truly enjoys working with others and brings the sense of an Aloha spirit and Christian love, day in and day out.

Richard G. Rajaratnam

Chief Operations Advisor


Lee Podoll
Lee Podoll

Chief Officer of Business Strategy and Development


Edelweiss von Maack

Chief Nursing Officer


Edelweiss von Maack serves as Chief Nursing Officer at SAC Health System. After working as a registered nurse for 18 years, she received her Master of Science in Nursing Administration from the University of Maryland, Baltimore campus and her Post Master’s Adult/Gerontology Nurse Practitioner certificate from Southern Adventist University in Collegedale, Tn. She has worked in various leadership roles including an emergency department in Panama City Beach, Florida and in academia at Whitworth University in Spokane, Washington. She has also worked as a Nurse Practitioner in various patient settings including neurology, student health and the Center for Health Promotion on the Loma Linda campus, specializing in weight management. She currently also works as a Nurse Practitioner for SAC Health System at the Norton location. Her passions include empowering the next generation of nursing leaders and giving back to the community by volunteering at no kill animal shelters.

Paul Foster - Chief People Officer
Paul Foster

Chief People Officer


June Sullivan

Chief People Officer


June Sullivan serves as the Chief People Officer, leading the development and implementation of strategic people initiatives to improve performance, profitability, growth, and employee engagement. She is passionate about people-centric cultures that advocate for the success of our team members. June holds a B.S. in Organizational Psychology, and her professional certifications include Senior Professional Human Resources (SPHR) and Professional Human Resources California Specific (PHRca). Before joining SACHS, June served as Director of Human Resources for a national risk management company, Lexipol LLC. Most recently, she served at Loma Linda University Health in the Strategic Program Management Office. SAC Health System welcomes June’s extensive experience, integrity, love for people, and her friendly and approachable style.

Kevin Shannon

Chief Officer of Quality and Compliance


Partnerships and Affiliations