Our Team

Stanford Global Health Leadership

Michele Barry

Senior Associate Dean of Global Health
Director of Global Health Initiatives in Medicine
Director of the Center for Innovation in Global Health

Michele Barry is the founder of the Yale/Stanford Johnson & Johnson Global Health Scholars Program and has sent over 1,000 physicians overseas to underserved areas. Barry is a past  More President of the American Society of Tropical Medicine and Hygiene (ASTMH) and an elected member of the Institute of Medicine and National Academy of Science.

Her scholarly interests include tropical medicine, global health ethics, and globalization’s impact on health disparities. She served on the Obama Women’s Health subcommittee and is a current Paul Rogers Society Ambassador to the US Congress for global health research advocacy. Dr. Barry is also a recipient of the Ben Kean Medal.

Dr. Michele Barry can be contacted via her Administrative Assistant, Anna Liao.


Steve Luby

Director of Research

Steve Luby serves as the Director of Research of the Center for Innovation and Global Health. Between 2004 and August 2012, Dr. Luby served as the Bangladesh Country Director for the US Centers for Disease Control.

He was secunded from CDC and posted into the International Centre for Diarrhoeal  More Disease Research, Bangladesh (ICDDR,B) where he directed the Centre for Communicable Diseases. In addition to earlier work at CDC, Dr. Luby also lived for five years in Karachi, Pakistan where he led the Epidemiology Unit of the Community Health Sciences Department at the Aga Khan University in Karachi, Pakistan. Dr. Luby has authored over 300 scientific articles, the majority concerning communicable disease epidemiology in low-income countries.

Steve can be contacted by researchers seeking input on implementing Stanford research activities in low-income countries, especially Bangladesh, and by trainees interesting in developing research skills in low-income countries.

Email: sluby@stanford.edu


Katherine Burke

Deputy Director

As Deputy Director, Katherine States Burke, MM, MSc, aims to foster interdisciplinary initiatives and partnerships across Stanford University and oversees all administrative operations of the Center. Prior to Stanford, Ms. Burke served as a Senior Fellow in Global Health Sciences at UCSF, where she   More led the UCSF Centers of Excellence Project.

Educated at Harvard University, Ms. Burke began her career as a reporter, editor and publishing executive in legal and consumer publications. In the past decade, she returned to an early interest in health and earned a Master of Science in Global Health Sciences from the University of California, San Francisco. She also has a MM from the Kellogg School of Management at Northwestern University.

Her interests include building research, training and health leadership capacity in low-resource settings, and online education as a tool in training health workers in Africa. Ms. Burke serves on several boards, including the board of Accordia Global Health Foundation and Harvard School of Public Health Board of Dean’s Advisers.

Email: ksburke@stanford.edu


Yvonne A. (Bonnie) Maldonado

Academic Director of Global Child Health

Dr. Maldonado earned her medical degree at Stanford University School of Medicine. She completed Pediatrics internship Stanford, Pediatric Residency and ID Fellowship at Johns Hopkins University. She then joined the Epidemic Intelligence Service at the Centers for Disease Control and Prevention before joining the faculty More  at Stanford University School of Medicine.

Dr. Maldonado’s research activities have included the epidemiology and prevention of viral infections such as rotavirus, measles, mumps, rubella, polio and pediatric HIV infection. Her research is conducted internationally in Zimbabwe and Mexico, as well as in the US. In 1989, Dr. Maldonado received the Epidemic Intelligence Service Alumni Award from the Centers for Disease Control and Prevention, and she was inducted into the Multicultural Alumni Hall of Fame at Stanford University in 2001. She is a Fellow of the American Academy of Pediatrics, a member of the Society for Pediatric Research, the Pediatric Infectious Disease Society, the Infectious Diseases Society of America, and the American Public Health Association.

Global Child Health Program website ›

Bonnie can be contacted by researchers seeking input on implementing Stanford research activities in low-income countries, and by trainees interested in developing research skills in low-income countries.

Email: bonniem@stanford.edu



Gary L. Darmstadt

Associate Dean for Maternal and Child Health
Professor & Department of Pediatrics Co-Director of Pediatric Global Health

Gary Darmstadt joined Stanford from the Bill & Melinda Gates Foundation, where he was Senior Fellow for Global Development. In this role, he led the Foundation’s cross-foundation initiative on Women, Girls and Gender, assessing   More how addressing gender inequalities and empowering women and girls leads to improved gender equality as well as improved health  and development outcomes. Previously at the Gates Foundation, Dr. Darmstadt served as Director of Family Health, leading strategy development and implementation across nutrition, family planning and maternal, newborn and child health.

Dr. Darmstadt was formerly Associate Professor and Founding Director of the International Center for Advancing Neonatal Health in the Department of International Health at the Johns Hopkins Bloomberg School of Public Health. He has trained in Pediatrics at Johns Hopkins University, in Dermatology at Stanford University, and in Pediatric Infectious Disease as a fellow at the University of Washington, Seattle, where he was Assistant Professor in the Departments of Pediatrics and Medicine. He left the University of Washington to serve as Senior Research Advisor for the Saving Newborn Lives program of Save the Children-US, where he led the development and implementation of the global research strategy for newborn health and survival.

Email: gdarmsta@stanford.edu


Ami Bhatt

Director of Global Oncology

Dr. Bhatt is an Assistant Professor of Medicine and Genetics at Stanford University. An honors graduate of UCLA, she received her MD and PhD (Biochemistry & Molecular Biology) at UCSF. There she received  More the Fineberg Award for Excellence in Teaching and was inducted into Alpha Omega Alpha.  She completed residency and chief residency in Internal Medicine at Brigham and Women’s Hospital and was a clinical fellow in Hematology/Oncology at the Dana-Farber/Partners Cancer Center. Thereafter, she carried out her post-doctoral studies at the Broad Institute of Harvard and MIT in the laboratory of Matthew Meyerson.

Dr. Bhatt seeks to improve outcomes in patients with hematological malignancies by exhaustively characterizing the dynamics of the microbiome in immunocompromised individuals, and exploring how changes in the microbiome are associated with idiopathic diseases in this population. Her recent work, demonstrating the discovery of a novel bacterium using sequence-based analysis of a diseased human tissue, was first presented as a Late-breaking abstract at ASH 2012 and has subsequently been presented nationally and internationally.

In addition to her academic efforts, Dr. Bhatt is committed to improving cancer care, education and research in resource-limited settings. She is the Director of Global Oncology for the Center for Innovation in Global Health at Stanford University and has also served as a visiting lecturer at the University of Botswana. She, along with Franklin Huang, is a co-founder and co-president of the non-profit organization Global Oncology. This all-volunteer organization spearheads creative, multi-disciplinary projects focused on improving cancer outcomes in impoverished settings.

Contact info:

269 Campus Dr, CCSR 1155b
Stanford, CA 94305


Sherry Wren

Director of Global Surgery

Sherry Wren first started her work in global surgery as a surgeon working for Doctors Without Borders/ Médecins Sans Frontières. She worked in multiple postings in conflict zones in Ivory Coast, Chad, and the Democratic Republic of Congo. She then branched out into capacity building of a surgical workforce in Sub Saharan Africa. In that role  More she participated in the MEPI grant with the University of Zimbabwe College of Health Sciences and is the program lead for a joint program with the departments of surgery at Stanford and UZCHS. Trainee and faculty exchanges are now routinely occurring between the two institutions.

She has also developed a research relationship with Mbingo General Hospital in Northwest Cameroon where Stanford medical students are paired with surgical residents from that program to perform joint clinical research projects. Her contributions to the region have been recognized by fellowship in the College of Surgeons of Eastern, Central, and Southern Africa (COSESCA). She currently serves as a board examiner of surgical trainees for the COSESCA countries. Dr. Wren is also one of the founders of the International Humanitarian Surgery skills course, which has to date, trained over 200 physicians to be prepared for surgical service in low resource settings. She has also performed collaborative projects with the NGO Surgeons OverSeas as well as other surgical clinical projects in Sierra Leone, Cameroon, Zimbabwe, and Nepal. 


S. V. Mahadevan

Director of Stanford Emergency Medicine International

S.V. Mahadevan is an Associate Professor of Emergency Medicine/Surgery at Stanford University School of Medicine.  Dr. Mahadevan is the founding director of Stanford Emergency Medicine International (SEMI), and he  More  co-directs the International Emergency Medicine Fellowship.  He has written, traveled, and taught widely, presenting over 400 invited lectures worldwide and authoring over 100 journal articles, book chapters, and multimedia publications.

He was instrumental in setting up India's first paramedic training institute (2007), India’s first prehospital research center (2009), Nepal's first EMS system (2010), Cambodia’s first EM strengthening program (2012) and Myanmar’s first public-private EM training program (2015).  He is lead editor of the textbook, An Introduction to Clinical Emergency Medicine, which was awarded the 2006 American Medical Writer’s Association Award: Physician’s Category.  Dr. Mahadevan has received numerous teaching awards including the Council of Residency Director’s (CORD) National Faculty Teaching Award (2003), American College of Emergency Physicians (ACEP) National Faculty Teaching Award (2012), California ACEP Education Award (2011), the Stanford-Kaiser Emergency Medicine Resident Bedside Teaching Award (2003), and the Arthur L. Bloomfield Award: Excellence in the Teaching of Clinical Medicine (2012).


Paul Costello

Global Health and Media Advisor  

Paul Costello is chief communications officer of the Stanford University School of Medicine and brings his rich and varied professional background to further the institution’s endeavors in global health.  More He hosts the award-winning podcast 1:2:1, a series of conversations about advances in healthcare policy and biomedical research, as well as CIGH's Conversations in Global Health seminar series. 

Costello is a veteran communications strategist with a background in government, the corporate sector and academia. He joined Stanford from the University of Hawaii, where he served as the vice president for external affairs and university relations. Costello previously spent several years as a press spokesperson in the White House, the Ohio Governor's office and the Mayor's office in Washington, DC, as well as in the private sector where he held management positions at several of the nation's top public relations firms.

A social worker by training, Paul holds an MSW from the University of Illinois at Campaign-Urbana.

Email: paul.costelllo@stanford.edu


Manu Prakash

Assistant Professor of Bioengineering

Manu Prakash is Assistant Professor of Bioengineering at Stanford University where he leads a curiosity driven research group working in the field of physical biology. His research approach brings together experimental and theoretical techniques from soft-condensed matter physics,  More  fluid dynamics, theory of computation and unconventional micro and nano-fabrication to open problems in biology: from organismal to cellular and molecular scale.

The Prakash Lab designs and builds precision instrumentation including droplet microfluidic tools to probe and perturb biological machines and their synthetic analogues. Along the way, they invent novel technologies in global health context with clinical applications in extreme resource poor settings. He was named a 2016 fellow of the John D. and Catherine MacArthur Foundation for his work creating devices that empower “frugal science,” such as Foldscope, an origami paper microscope that costs less than $1 to produce. Dr. Prakash holds numerous patents and his research has been published in such scientific journals as PLoS OneJournal of Experimental Biology, Science, and Nature, among others. 


Geoff Tabin

Professor of Ophthalmology and Global Medicine

 Dr. Geoff Tabin is Co-Founder and Chairman of the Himalayan Cataract Project whose passion for mountain climbing directed him to his professional career in eye care. He is the fourth person in the world to reach the tallest peak on each of the seven continents.  More 

After summiting Mt. Everest, on one of his expeditions, he came across a Dutch team performing cataract surgery on a woman who had been needlessly blind for three years. It was then he understood his life calling.

Tabin graduated from Yale University and then earned an MA in Philosophy at Oxford University on a Marshall Scholarship. From there, he took his interest in moral philosophy and health care delivery to Harvard Medical School where he earned his MD in 1985. After completing an ophthalmology residency at Brown University and a fellowship in corneal surgery in Melbourne, Australia, Dr. Tabin returned to Nepal to work with Nepalese eye surgeon Dr. Sanduk Ruit, with whom he co-founded the Himalayan Cataract Project.

The organization was founded in 1995 with the goal to eliminate all preventable and treatable blindness from the Himalayan region in Tabin and Ruit’s lifetime. It has since expanded beyond the Himalayas to encompass Sub-Saharan Africa. Dr. Tabin spends a considerable part of the year working abroad throughout the Himalayas and Sub-Saharan Africa. At Stanford, his practice focus encompasses surgery and treatment of diseases of the anterior and external eye including cataract and corneal surgery.


External Advisors

Diana Chapman Walsh

President Emerita, Wellesley College and Senior Advisor, Stanford Global Health

Diana Chapman Walsh was the twelfth president of Wellesley College and is a recognized leader in higher education. Her presidency, from 1993-2007, was marked by educational innovation, including a revision of the curriculum and expanded programs   More in global education, the humanities, internships and service learning, interdisciplinary teaching and learning, and religious and spiritual life.

Dr. Walsh currently serves on the governing boards of the Kaiser Family Foundation and the Massachusetts Institute of Technology (and its executive committee). Her recent board service includes the Institute for Healthcare Improvement, the inaugural board of the Broad Institute of MIT and Harvard (which she chaired), and the Mind and Life Institute. Prior to the Wellesley presidency, Dr. Walsh was Florence Sprague Norman and Laura Stuart Norman Professor at the Harvard School of Public Health, where she chaired the Department of Health and Social Behavior. Before Harvard, she was a University Professor at Boston University and Professor of Social and Behavioral Sciences in the School of Public Health.

She has published and spoken widely on public health and higher education, and is a member of the American Academy of Arts and Sciences and the Center for Innovation in Global Health's Climate Change and Health Initiative. 


Cassia van der Hoof Holstein

Senior Advisor, Stanford Global Health

Cassia van der Hoof Holstein is a Fellow of the Emerson Collective and a Senior Advisor to the Center for Innovation in Global Health at Stanford University’s School of Medicine. She chairs the Board of Directors of Plus 1, which connects recording artists, their audiences, and pragmatic social justice efforts, and   More serves on the Boards of Directors of the New Senior Investment Group (NYSE: SNR); PIVOT, a global health non-profit based Cassia van der Hoof Holstein is a Fellow of the Emerson Collective and a Senior Advisor to the Center for Innovation in Global Health at Stanford University’s School of Medicine. She chairs the Board of Directors of Plus 1, which connects recording artists, their audiences, and pragmatic social justice efforts, and serves on the Boards of Directors of the New Senior Investment Group (NYSE: SNR); PIVOT, a global health non-profit working to break cycles of poverty and disease in and beyond rural Madagascar; and Agile Global Health (formerly known as A&K Global Health LLC), a private global healthcare management company. She is a Trustee of Partners In Health and a member of the Advisory Board of the Community Outreach and Patient Empowerment (COPE) Program in the Navajo Nation.

Previously, Cassia served as Chief of Staff to Dr. Paul Farmer, and as Chief Partnership Integration Officer for Partners In Health. She was Associate Director of the Global Health Delivery Partnership for the Department of Global Health and Social Medicine at Harvard Medical School. With Abbey Gardner, she edited "Haiti After the Earthquake,” by Dr. Paul Farmer, published in 2012. Previously, Cassia was Director of Rural Health at the Clinton HIV/AIDS Initiative (CHAI); an Executive Producer at E*TRADE Financial; and a co-founder of ClearStation.com. She studied Literature at Harvard College, and was honored to get her start in global health in the Poverty Issues office of the U.S. Senate Committee on Labor and Human Resources, then chaired by Senator Edward M. Kennedy. 


Core Staff

Meredith Miller Vostrejs

Program Director

Meredith joined CIGH in August 2018 as Program Director for the new Women Leaders in Global Health Initiative. Prior to joining us she worked at Stanford’s Handa Center for Human Rights and International Justice.   More 

Meredith has over twenty years’ experience in global health program management, partnership development, capacity building, and community engagement to increase vulnerable populations’ access to services.

Meredith has an M.A. from Johns Hopkins School of Advanced International Studies and a B.A. from UC Santa Cruz.

Email: mmvos@stanford.edu


Jill Mueller

Program Administrator, Stanford Woods Institute

Jill serves as Program Administrator for the Stanford Woods Institute for the Environment, supporting Dr. Stephen Luby's Lab. Prior to joining the Stanford Woods Institute, Jill served    More at 

Stanford Hospital & Clinics. Previously, she served at several high tech companies. Jill enjoys music and travel. At the Center for Innovation in Global Health, Jill plays an integral role in supporting the Center's research initiatives directed by Dr. Luby, including the annual Global Health Research Convening. 

Email: sjillmueller@stanford.edu


Denishia Clark

Global Health Educational Program Coordinator

Denishia Clark manages global health curriculum and educational programs for students, fellows, residents and career faculty.  A public health  More advocate, Denishia is experienced in the improvement of health practices and systems for underserved communities.

She joined Stanford from the Black AIDS Institute where she served as the manager of training and capacity building programs. Denishia received her undergraduate degree in Kinesiology from San Diego State University, and holds a Master’s degree in Urban Public Health from Charles R. Drew University of Medicine and Science.

Denishia can be contacted regarding global health educational opportunities and programs.

Email: dclark13@stanford.edu


Jody Berger

Communications Manager

Jody Berger joined CIGH in June 2018. An award-winning journalist, Jody wrote for national magazines and newspapers, including the Los Angeles Times, the Rocky Mountain News, Sports Illustrated and ESPN Magazine. She co-authored The Loyalist Team: How Trust, Candor and Authenticity Create Great Organizations.   More 

Jody came to Stanford on a Knight Fellowship in 2004 - 2005 and return in 2017 as a senior writer for Medical Center Development. She earned a bachelor's degree in philosophy from Duke University. 

Email: jlberger@stanford.edu


Ashley Jowell

Program Associate

Ashley Jowell is the Program Associate for Stanford Center for Innovation in Global Health. She graduated with her BAH in Human Biology (2018)  and MS in Earth Systems (2018) from Stanford University.  As a student, she was deeply engaged in public service initiatives locally as well as in Tanzania.  More 

She enjoys engaging with students and faculty across campus on global health related topics and fostering collaborations across the university to address global health difficulties. She is particularly passionate about planetary health, and understanding the impacts of environmental change on human health. She loves meeting and interacting with new people, so please do not hesitate to reach out to her if you ever have any questions about getting involved with CIGH. 

Email: ajowell@stanford.edu