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Foundation Staff

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Senior Leadership TeamPamela W. Barnes
President and Chief Executive Officer


President and Chief Executive Officer Pamela W. Barnes is responsible for the strategic, programmatic, fundraising, financial, and management operations of the Elizabeth Glaser Pediatric AIDS Foundation. Prior to joining the Foundation, where she previously served as Chief Operating Officer and acting CEO, Barnes held executive positions at the International Trachoma Initiative and Planned Parenthood Hudson Peconic in New York, and worked for more than 20 years in investment management and corporate finance. Barnes also served as a Peace Corps volunteer in Paraguay.

Alan Greenberg, M.D., M.P.H.
Senior Technical Advisor to the CEO

Alan Greenberg, M.D., M.P.H., is principal investigator of the George Washington University–Elizabeth Glaser Pediatric AIDS Foundation Partnership for Pediatric AIDS. Dr. Greenberg serves as senior technical advisor to the Foundation’s President and CEO. In addition, Dr. Greenberg holds several professorships within the George Washington School for Public Health and Health Services. Prior to joining George Washington, he spent two decades at the U.S. Centers for Disease Control and Prevention, where he provided scientific leadership for its domestic and international HIV epidemiologic research program. Dr. Greenberg earned his medical degree from the George Washington University School of Medicine in 1982 and his masters in public health from the Harvard School of Public Health in 1999.

Cathy Wilfert, M.D.
Senior Technical Advisor to the CEO

Scientific Director of Prevention of Mother-to-Child Transmission Dr. Cathy Wilfert spearheads the Foundation’s PMTCT programs, has been instrumental in encouraging other scientists throughout the world to focus their investigations on pediatric HIV/AIDS. A faculty member at Duke University Medical Center for 38 years, her national leadership roles have included chairmanship of the Advisory Committee on Immunization Practices (ACIP) of the Centers for Disease Control, membership in the Institute of Medicine (IOM), the presidency of the Infectious Diseases Society of America, editorial boards of eight professional journals, plus numerous awards and special recognitions, including the Baylor International Pediatric AIDS Initiative (BIPAI) Leadership Award.

Nicholas Hellmann, M.D.
Executive Vice President of Medical and Scientific Affairs

Executive Vice President of Medical and Scientific Affairs Dr. Nicholas Hellmann is responsible for providing strategic direction for the Foundation’s programs and research initiatives, ensuring that children are at the forefront of scientific breakthroughs. Prior to joining the Foundation, Dr. Hellmann played key leadership roles, primarily focused on HIV/AIDS, at the Bill and Melinda Gates Foundation, ViroLogic, Inc., Gilead Sciences, Roche Molecular Systems, and Bristol-Myers Squibb Pharmaceutical Research Institute. He received his M.D. from the University of Kentucky and served as an assistant professor in the Internal Medicine/Infectious Diseases Division at the University of California, San Francisco.


Carlos Carrazana, M.B.A., M.P.H.
Chief Operating Officer

Chief Operating Officer Carlos Carrazana has over 20 years of experience working with government agencies, foundations, civil society, and commercial firms to design and implement programs to improve health care services in vulnerable and underserved populations around the world. Carrazana came to the Foundation in April 2008 from business research and consulting firm Abt Associates, where he served five years as vice president of health services and private sector alliances for Abt’s international division. Prior to his tenure at Abt, Carrazana served at Deloitte Touche Tohamatsu’s emerging markets division as director of the Summa Foundation, where his primary focus was establishing and enhancing the organization’s infrastructure.

Laura Guay, M.D.
Vice President of Research

Dr. Laura Guay serves a dual appointment as vice president for research at the Foundation and research professor at The George Washington University (GWU) School of Public Health and Health Services. Dr. Guay received her M.D. from GWU in 1985, and went on to a pediatrics residency at Rainbow Babies & Children’s Hospital and Case Western Reserve University (CWRU) in Cleveland, Ohio. Dr. Guay was a visiting lecturer at Makerere University in Kampala, Uganda, from 1988 to 1991, and then returned to CWRU to complete her fellowship in pediatric infectious diseases. She then spent seven more years in Uganda, where she worked on the landmark HIVNET 012 trial, which determined the effectiveness of single-dose nevirapine in preventing mother-to-child transmission of HIV. Prior to joining GWU, Dr. Guay was a member of the faculty of the Johns Hopkins University School of Medicine. Most recently, her research has focused on reducing the rate of HIV transmission in breast-feeding infants and on the testing of an HIV vaccine in infants.

Maurice Adams, Ph.D.
Vice President, Field Operations

Vice President for Field Operations Dr. Maurice Adams is based at the Johannesburg, South Africa, office, responsible for overseeing the management of strategic operations across the Foundation’s Africa country programs. Dr. Adams joined the Foundation in 2003 as the country director for Zimbabwe. Prior to this, he was Chief of Party for a USAID/CDC-supported program in Uganda, and in Zimbabwe he held the positions of program officer for UNICEF and director for the U.K. group, VSO. With more than 20 years of international experience, 12 of these located in East and Southern Africa, Dr. Adams holds a Ph.D. in management and human development, an M.A. in management of international non-government organizations, and degrees in social work and community health.

Trish Devine Karlin
Vice President, Program Implementation

Vice President of Programs Trish Karlin is responsible for program operations and planning; program and resource management; and program design, strategy, reporting, outcomes, and communications. During her 15-year tenure at the Foundation, she has helped the Foundation to establish several notable current programs. Before joining the Foundation, Karlin worked for the California State Controller’s Office and served as Executive Director of the John M. Lloyd Foundation, where she is currently a board member.

Richard Marlink, M.D.
Vice President, Technical Implementation

Vice President for Technical Implementation Dr. Richard Marlink oversees the Foundation’s efforts to expand global HIV/AIDS care and treatment services, including antiretroviral treatment. Currently a professor at the Harvard School of Public Health, Dr. Marlink was part of the team that initially identified HIV-2, the second AIDS virus, and he helped coordinate research concerning the clinical and biologic characteristics of both HIV-1 and HIV-2. In addition to a number of Botswana clinical studies in which he participates, Dr. Marlink is the principal investigator of Botswana's first large-scale antiretroviral treatment study.


Diane E. Thompson
Vice President, Public Policy and Communications


Vice President for Public Policy and Communications Diane E. Thompson is responsible for development and implementation of the Foundation’s public policy and communications strategies. Prior to joining the Foundation, Thompson held executive positions in the private sector and the government, including service at both the US Food and Drug Administration and the US Environmental Protection Agency. She has been a partner at both public policy consulting and law firms, and an adjunct professor at Hastings Law School.

Tami Ward-Dahl
Vice President, Human Resources

Vice President of Human Resources Tami L. Ward-Dahl is responsible for developing and managing the overall strategic human resource systems, practices, and approaches to support the Foundation’s organizational growth and development. Prior to joining the Foundation, Ward-Dahl held executive positions at Ruesch International, IOMEGA Corporation, and OTC Division. She is certified as a Senior Professional in Human Resources, a Global Professional in Human Resources, and a Certified Compensation Professional.

Scientific Expert
Christian Pitter, M.D., M.P.H.
Senior Medical/Technical Officer


Senior Medical/Technical Officer Dr. Christian Pitter shares oversight of the Foundation’s international programs for prevention of mother-to-child transmission of HIV (PMTCT), and works closely on care and treatment programs. Currently an assistant adjunct professor of pediatrics at the University of California, San Francisco, Dr. Pitter served as the principal advisor for antiretroviral treatment programs for the U.S. Centers for Disease Control and Prevention (CDC) Global AIDS Program in Uganda prior to joining the Foundation. He has also served as an advisor to the World Health Organization, UNICEF, the government of Uganda, and other organizations.

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