Impact Fellows

Margaret Anderson is a senior executive, strategic advisor, and board leader with deep experience advancing biomedical innovation, patient engagement, and cross-sector collaboration across the nonprofit, government, and commercial healthcare sectors. Most recently, she served as a Managing Director at Deloitte, where she advised organizations on biomedical research transformation, health systems strategy, and stakeholder engagement. Previously, she served as Executive Director of FasterCures, a center of the Milken Institute focused on accelerating patient-centered medical research and innovation. Earlier in her career, she held leadership and policy roles with organizations including the American Public Health Association, the Society for Women’s Health Research, and the Congressional Office of Technology Assessment.

Throughout her career, Anderson has focused on improving health outcomes through collaboration across science, policy, advocacy, and patient communities. She currently serves on the presidentially appointed National Cancer Advisory Board and holds advisory and governance roles with organizations including Act for NIH, the Allen Institute for Brain Science, FasterCures, and Friends of Cancer Research. She is currently writing a book on the Arc of a Woman’s Career. As a UC Berkeley School of Public Health Impact Fellow, she is exploring the intersection of women’s careers, caregiving, and public policy, with a particular focus on the long-term health, economic, and professional impacts of the absence of a national paid family and medical leave policy in the United States.

Tosan Boyo is the Founder and CEO of Olusan Platforms, a technology company building AI-powered governance infrastructure to ensure that no Medicaid member loses coverage for procedural reasons. He believes no one should have to choose between healthcare and caring for their families. Tosan also serves as Board Member of IHI and as a Committee Member of NCQA, contributing to the governance of healthcare quality and safety frameworks worldwide.

Tosan previously served as President of Sutter Health East Bay, where he oversaw six hospitals and 20 ambulatory centers serving 500,000 patients, led a $2 billion transformation strategy including a cancer center joint venture with Stanford Medicine, and served concurrently on the Board of Directors of Alameda Alliance, a Medicaid plan serving more than 400,000 members. At John Muir Health, he led the inaugural Medicaid strategy and system service lines and was named Executive of the Year by the California Association of Healthcare Leaders. As Chief Operating Officer of San Francisco General Hospital, he was appointed to lead the City’s COVID-19 Command Center and directed the Epic activation that unified 60 medical record systems across the enterprise.

His work has been recognized with 40 Under 40 honors from Modern Healthcare, Becker’s Hospital Review, and the San Francisco Business Times, along with community impact awards from the NAACP, Native American Health, the San Francisco Department of Public Health, and the City of Oakland. Outside of work, Tosan is a girl-dad, cinephile, and traveler.

Bryan Bucklew is President and CEO of the Hospital Council of Northern & Central California, the nation’s largest regional hospital association, representing more than 200 hospitals across 50 of California’s 58 counties. He serves at the center of California’s federated hospital association structure and concurrently serves on the California Hospital Association Board of Trustees and Executive Committee. With more than two decades of leadership spanning healthcare policy, government relations, economic development, and public affairs, Bucklew is widely recognized for aligning complex stakeholder groups to drive large-scale system change and measurable policy outcomes across California’s healthcare landscape.

Under his leadership, the Hospital Council has advanced major statewide initiatives addressing behavioral health access, ambulance patient offload times, hospital emergency preparedness, and healthcare financial sustainability. He led cross-sector efforts that expanded treatment capacity by more than 900 beds, over 100,000 treatment slots, that also reduced emergency department boarding delays throughout multiple high-demand regions. His work has focused heavily on integrating innovation, technology-enabled care models, and cross-sector partnerships to address behavioral health and substance use disorder challenges in both urban and rural communities. He also played a leading role in California’s response to the Madera Community Hospital closure and helped establish hospitals as critical infrastructure during Public Safety Power Shutoff events, resulting in zero PSPS-related hospital disruptions over five consecutive years.

Earlier in his career, he co-founded OneFifteen, a nationally recognized addiction treatment ecosystem developed in partnership with competing hospital systems and Verily Life Sciences, focused on advancing data-driven and tech-enabled approaches to substance use disorder treatment and recovery.

Bucklew’s Impact Fellowship work will focus on strengthening alignment between California’s public health, behavioral health, and healthcare delivery systems to improve long-term community health outcomes and system resiliency.

Dr. Kapil Dhingra is the Physician-in-Chief and Chief of Staff for the Kaiser Permanente San Leandro Medical Center and the Hayward and Union City Medical Offices across the Greater Southern Alameda Area, where he leads clinical operations, quality, safety, care experience, and financial performance for more than 370,000 Kaiser Permanente members.

An emergency physician and health care executive, Dr. Dhingra brings a systems-oriented approach to leadership. His work focuses on strengthening clinical care, developing physician leaders, advancing equity, and improving how care is delivered in complex health care environments. He serves as a Board Director for The Permanente Medical Group and the Mid-Atlantic Permanente Medical Group and as Chair of the Compensation and Benefits Committee for The Permanente Medical Group Board. He also serves on the Board of Directors for the Northern California American Red Cross and on the Advisory Council of the Asian Pacific Fund.

Dr. Dhingra earned his Bachelor of Arts in Economics from UC Berkeley and his Doctor of Medicine and Master of Business Administration from Tulane University. He maintains strong ties to UC Berkeley as a guest lecturer at the UC Berkeley Haas School of Business and through a capstone partnership he built and sustains between Kaiser Permanente’s Greater Southern Alameda Area and the UC Berkeley School of Public Health’s Health Policy and Management Program.

Dr. Dhingra’s leadership has been recognized with The Permanente Medical Group’s Health Equity Excellence Award, Modern Healthcare’s Top 25 Emerging Leaders recognition, and the R.J. Erickson Award for Equity, Inclusion, and Diversity. Under his leadership, Kaiser Permanente San Leandro Medical Center has also received recognition from The Leapfrog Group as a Top Hospital.

Josh Golomb is a healthcare entrepreneur who has spent his career building companies that expand access to care for people the system tends to overlook. He most recently served as Founding CEO of Hazel Health, bringing physical and mental health services to where kids spend the majority of their week — their schools — reaching districts serving more than four million students, the majority from underserved communities. Before Hazel, Josh was CEO of Everside Health, one of the largest direct primary care providers in the U.S., and earlier co-founded and led DaVita Rx, the largest pharmacy for patients with kidney disease.

Much of what drives Josh’s work traces back to his family. When his son Gabe was born deaf, Josh and his wife encountered an extraordinary community of clinicians, educators, and specialists — including the team at Weingarten Children’s Center (WCC), where Gabe thrived. But even with every advantage, they found it remarkably hard to navigate the fragmented system around those providers. Gabe is now thriving as a junior in college, and that experience is part of what motivated Josh to start Hazel Health and what anchors his work today as Board Chair of WCC, supporting the Talk2Me platform.

As an Impact Fellow, Josh will focus on mapping the services and supports that exist for families of deaf and hard of hearing children, and identifying ways to help them connect more easily to the passionate providers already doing this work across a complex landscape.

Dr. Jessica Green is a Program Manager at the Advanced Research Projects Agency for Health (ARPA-H), where she stewards an innovation portfolio translating science into practical public health solutions. Previously, she served as founding CTO and CEO of a venture-backed microbiome data analytics company, scaling it to a global team serving Fortune 500 clients and earning recognition as a World Economic Forum Technology Pioneer. During the COVID pandemic, she led the development of novel methods for efficiently monitoring airborne pathogens in buildings as large as the World Trade Center.

Prior to founding her company, Jessica served as founding faculty at UC Merced and later at the University of Oregon, where she co-founded the Biology and Built Environment Center, advancing research on healthy and sustainable buildings and cities.

Jessica earned a PhD in Nuclear Engineering and an MS in Civil and Environmental Engineering from UC Berkeley. She has published research in biodiversity conservation, microbiome science, and environmental health in journals including Nature, Science, and PNAS. She serves on several boards and science advisory councils, including Revive & Restore, a nonprofit at the frontier of genomic conservation and de-extinction science, and the NSF Center for Pandemic Insights. Her work has been recognized with a Guggenheim Fellowship, Blaise Pascal International Research Chair, and TED Fellowship.

Outside of work, Jessica enjoys open water swimming, skiing and time with her family in Berkeley.

Sara Holoubek is the founding partner of Luminary Labs, a strategy and innovation consultancy established in 2009 that serves the private sector, federal agencies, and philanthropic organizations. With over 25 years of experience guiding clients through technological disruption, regulatory complexity, and organizational transformation, Sara now focuses on executive advisory services — helping senior leaders navigate change and make confident decisions in the face of uncertainty.

Throughout her career, Sara has pioneered new ways of working, structured public-private partnerships, helped organizations place considered bets on the future, and designed novel funding mechanisms; under her leadership, Luminary Labs designed and produced open innovation programs — including accelerators, prizes, and piloting programs — representing more than $350 million in potential incentives for effective and scalable solutions.

Her non-profit roles have included serving on the inaugural RWJF Pioneer Fund Advisory Group, the Aspen Health Innovation Project Planning Committee, the Smithsonian Institution’s Museum of Natural History 2020 Visiting Scientist Committee, the 2024 Health Datapalooza Advisory Committee, and chairing the national board of Step Up. Sara writes and speaks extensively on the intersection of technology, innovation, and humanity and is the author of Open Innovation for Impact: Perspectives on Impact: Leading Voices On Making Systemic Change in the Twenty-First Century. She holds a BA from the University of Iowa and an MBA from HEC in France.

Margaret Laws is Executive in Residence at Hopelab, where she served as President and CEO from 2015–2025. Hopelab is a transformative social innovation lab and impact investor working to support the mental well-being of young people, with a specific focus on underserved populations, including Black, Brown and Queer youth and young adults. At Hopelab Margaret led a multidisciplinary team focused on uncovering and translating knowledge and evidence, investing in innovators through Hopelab Ventures, and supporting and funding youth voice and power in the mental health and wellbeing and responsible technology sectors.

Prior to Hopelab, Margaret spent 17 years at the California HealthCare Foundation in a number of roles, including Director of Public Financing and Policy and Director of the Innovations for the Underserved program. She founded the CHCF Health Innovation Fund, a mission-focused fund investing in health care technology and service companies that improve access to and lower costs of health care. Prior to CHCF, Margaret held positions with Accenture, the World Health Organization, Mentor Clinical Care and the Commonwealth of Massachusetts.

Margaret holds a Master’s degree in Public Policy from Harvard University’s John F. Kennedy School of Government and an AB in English Literature from Princeton University. Margaret is a lecturer in entrepreneurship at the Stanford Graduate School of Business. She serves on the boards of Health Leads, United States of Care and Project Glimmer, and is an adviser to Town Hall Ventures, Young Futures, Galileo Health and a number of early stage health care and mental health companies.

Dr. Pooja Mittal is the Chief Health Equity Officer (CHEO) for Health Net. She leads the company in developing, implementing, and embedding health equity strategic initiatives into Health Net’s programs, services, and actions to drive positive health outcomes. Her team leads population health, campaign-based outreach and strategic planning for equity-focused benefits. Dr. Mittal has an expertise in maternal child health and is deeply committed to being an ally in the movement for Black birth justice. In addition to her role as CHEO, Dr. Mittal practices as a Family Medicine physician at a Federally Qualified Health Center in San Mateo County. She is an Adjunct Associate Professor in Family and Community Medicine at UCSF and Stanford University School of Medicine. She is mother to three girls.

Dr. Stella Safo, MD, MPH is a Ghanaian-American HIV primary care physician and public health practitioner dedicated to advancing health equity. Harvard-trained with degrees in BA, MD, and MPH, she founded Just Equity for Health in 2021, a healthcare improvement company that advances equitable care delivery through advocacy, education, and care model design. Dr. Safo previously served as Senior Medical Director for Clinical Transformation at Mount Sinai Health System, leading primary care redesign, and later as Chief Clinical Transformation Officer at Premier Inc., overseeing national healthcare research that utilized large databases to identify clinical findings impacting patient care across U.S. health systems.

Currently, Dr. Safo holds faculty or leadership positions at Mount Sinai Health System, Montefiore Medical System, and Stanford Biodesign Policy Fellowship. Her research focuses on healthcare delivery challenges for historically marginalized populations and has been featured in various academic and popular media, including JAMA, CNN and MSNBC. Dr. Safo is founder or co-founder of multiple organizations and initiatives including Thriving in the Last Mile, Green Book for Health, Civic Health Alliance, and Equity Now at Mount Sinai. She provides clinical care to people living with HIV/AIDS and LGBTQ+ patients in New York, where she has practiced for over 13 years, while lecturing nationally on health equity and social justice in medicine.