Dr. Christides is an accomplished healthcare executive with more than 20 years of clinical and healthcare leadership experience across value-based care, population health, and managed care operations. Most recently, he served as Senior Medical Director, Population Health at Astrana, where he led clinical and population health initiatives across the organization.

Prior to joining Astrana, Dr. Christides served as Senior Medical Director at Optum and as Chief Medical Officer at AppleCare Medical Management, where he held leadership roles focused on clinical strategy, care quality, and value-based care delivery.

Dr. Christides earned his B.S. in Cell and Molecular Biology from University of California, Los Angeles and his medical degree from Penn State College of Medicine. He completed his residency in internal medicine at University of Southern California and also holds an MBA from West Texas A&M University.

Georgie Sam is the Chief Data & Analytics Officer (CDAO) at Astrana Health, where he leads the company’s enterprise-wide data, analytics, and AI strategy and execution. A visionary technology executive with more than 20 years of experience in the healthcare data and analytics space, Georgie has a proven track record of building transformative cloud native data and AI solutions that improve clinical and financial outcomes, optimize operations, and enhance experiences for patients and providers.

Throughout his career, Georgie has earned a reputation as a data and analytics leader known for turning complex challenges into scalable, high-impact innovations — specifically for healthcare. He has successfully led the design and implementation of enterprise platforms that harness data and AI to power actionable insights, enable smarter decision-making, and drive meaningful results across care delivery, population health management, and digital transformation.

Prior to joining Astrana Health, Georgie served as Senior Vice President of Data & Technology at Alignment Healthcare. In this role, he was responsible for building the company’s end to end data and analytics ecosystem – including enterprise data strategy, cloud-based platforms, business intelligence, data governance, and modern data architecture. He played a pivotal role in Alignment’s growth from a startup to a leading Medicare Advantage plan and was instrumental in its successful IPO.

Georgie holds a Master’s degree in Computer Science from Bharathidasan University, Tamil Nadu, India, and a Bachelor’s degree in Physics from Mahatma Gandhi University, Kerala, India.

Edgar Garrobo is the Vice President of Information Security (CISO) at Astrana Health, leading the company’s cybersecurity strategy to protect critical data and systems in the healthcare sector.

With over 20 years of experience, Edgar is an expert in technology and security management across diverse industries.

Prior to Astrana Health, Edgar held key roles, including Director of Information Technology at DoubleLine Capital Group, where he implemented security frameworks to protect sensitive financial data. At Viking, he managed global security strategies to safeguard customer and operational data in the cruise hospitality sector as Viking’s Vice President of Information Technology. He also served as a fractional CISO, providing strategic guidance to various organizations.

Recognized for his hands-on approach and technical expertise, Edgar consistently improves risk management and compliance. He actively contributes to the cybersecurity community, sharing insights on emerging threats.

Edgar holds a Bachelor of Science degree in Technology and Operations Management from California Polytechnical University Pomona.

Jaime Melkonoff is President, AstranaCare of Texas, where she leads Astrana Health’s Texas operations.

Born and raised in Arizona, Jaime’s professional career in health care started over 25 years ago processing claims for a Medicaid plan in Arizona. Her journey in healthcare advanced over time to additional roles and responsibilities including leading claims, IT, customer service, referral, provider network, grievances/appeals, operational oversight/audit, project management and other departments at health plans like CalOptima, Molina and Health Choice Arizona, serving as COO with multiple organizations and managing operations in multiple regions across the country. Prior to joining Astrana Health, Jaime was working at Prospect Medical Systems as the business development and strategy leader for the IPA/MSO where she led several inorganic and organic growth strategies that doubled the size of the membership in her tenure.

Jaime received her MBA from Brandman University through Chapman University’s master’s program and Bachelor’s degree in Public Agency Service from Northern Arizona University (cum laude graduate).

Rita Pew is the Chief People Officer at Astrana Health, where she leads the company’s HR and people operations, including areas such as change management, talent acquisition, employee engagement, and organizational development.

Before joining Astrana, Rita spent a decade at DaVita, serving in various leadership roles focused on advancing the company’s Chronic Kidney Disease (CKD) strategy in partnership with nephrologists. She brings a uniquely versatile background through a blend of operational and people experience across M&A integration, MSO operations, system implementations, and data analytics—applying a hands-on, practical approach to aligning people strategies with business goals.

Rita holds an MBA from UCLA and a Bachelor of Science in Chemical & Biomolecular Engineering from the University of Pennsylvania.

Dr. Albert Young is the Senior Vice President of Health Affairs at Astrana Health, formerly known as ApolloMed. Dr. Young has served as Senior Vice President of Health Affairs since 2024 and previously served as Chief Administrative Officer. Dr. Young received his medical degree from West Virginia University School of Medicine and completed his internal medicine residency training at Los Angeles County and USC Medical Center. Upon completing his residency training, Dr. Young completed a fellowship in pulmonary medicine. An advocate of general preventive medicine, Dr. Young also obtained a master’s degree in public health from UCLA in 1998.

Dr. Jeremy Jackson joined Astrana Health, formerly ApolloMed, as Chief of Staff in March 2021 and was promoted to Chief Quality Officer in June 2021. In his current role, he spearheads critical areas including quality improvement, risk adjustment, and member experience programs. Bringing over a decade of healthcare industry experience to Astrana Health, Dr. Jackson blends his management consulting expertise with his background as a practicing physician. His previous experience includes a tenure as a Project Leader in the healthcare practice at the Boston Consulting Group.

From 2011 to 2018, Dr. Jackson served in the Department of General Surgery at Brigham and Women’s Hospital, affiliated with Harvard Medical School, where he led postoperative care teams for patients with a wide spectrum of general surgical conditions. Further, he served as Chief Resident in Quality and Patient Safety at the Department of Surgery at the Boston Veterans Affairs Hospital from 2017 to 2018 and as a research fellow focused on Surgical Oncology in the Department of Pediatric Surgery at the Children’s Hospital Los Angeles from 2014 to 2016.

Dr. Jackson obtained his Doctor of Medicine from the University of Michigan Medical School. He also holds a Bachelor of Arts in Biological Sciences, graduating Magna Cum Laude, from the University of Southern California.

Chan Basho is Chief Financial Officer and Chief Operating Officer at Astrana Health, where he is responsible for leading the development and execution of Astrana Health’s finance, strategy and operations along with improving operating discipline to ensure the Company’s ability to scale successfully.

Mr. Basho possesses 15 years of experience in strategy, finance, and operations at reputable healthcare companies, most recently having served as Vice President of Strategy and Corporate Development at Alignment Healthcare since 2018. From 2017 to 2018, Mr. Basho served as Chief Financial Officer at Alsana, a private equity-backed behavioral health company. From 2014 to 2017, Mr. Basho served in different positions at HealthCare Partners, a DaVita Medical Group company, including as Vice President of Strategy and Corporate Development leading strategy and development for the California market. From 2007 to 2014, Mr. Basho served in different capacities related to strategy and finance at DaVita Kidney Care, including as Director of Corporate Finance.

Mr. Basho received a bachelor’s degree in Bioengineering from the University of California, Berkeley, and an MBA from the Wharton School at the University of Pennsylvania.

Brandon Sim is the President and Chief Executive Officer of Astrana Health, where he leads the company in its mission to enable providers in delivering accessible, high-quality, and high-value care to all. At Astrana Health, he leads the healthcare delivery transformation effort for physicians and patients and oversees the company’s strategy, growth, operations, and technology innovation. Prior to his current role, he served as Chief Operating Officer, Chief Technology Officer, and Vice President of Engineering at Astrana Health, formerly known as ApolloMed, joining the organization in 2019. 

Prior to joining Astrana, Mr. Sim was a Quantitative Researcher at Citadel Securities from 2015 to 2019, and before that, co-founded and served as Chief Technology Officer at Theratech, a medical device startup. Mr. Sim serves as a board member for a private healthcare technology company and prior served as a board member of Cardio Diagnostics (NASDAQ:CDIO).

Mr. Sim received his M.S. in Computer Science and Engineering as well as his B.A. in Statistics and Physics with high honors from Harvard University.

Lucas D. Taylor is President of Astrana Health’s Southwest Division, overseeing operations in Nevada, Arizona, and Northern California. Here, he is focused on building foundations for profitable growth and sustainable products that serve both providers and patients in advancing the mission of healthy communities.

With extensive experience across payers, providers, and Independent Physician Associations, Mr. Taylor has been instrumental in guiding healthcare organizations toward patient-centered care. Prior to joining Astrana Health, he served as Senior Vice President of Operations at Upperline Health, the nation’s largest specialty-focused Accountable Care Organization (ACO). He also played a pivotal role at Alignment Healthcare, leading the company from startup to a leading Medicare Advantage company and its 2021 IPO.

Mr. Taylor holds a Bachelor of Science degree in Biochemistry from the University of California, San Diego, and was the top award winner in the University of Notre Dame’s MBA program.​