Leadership

Hank Tomlinson, Ph.D., serves as the Director of the Division of Global HIV & TB at the U.S. Centers for Disease Control and Prevention (CDC). In this role, he guides the management of CDC’s global TB and HIV treatment, care and prevention programs and the division’s 1,800 staff in 45 country offices and headquarters in Atlanta. Prior to being named Director of the Division of Global HIV & TB, Dr. Tomlinson served as the Division’s Principal Deputy Director, and he also served as Country Director and Division of Global HIV & TB Program Director for the CDC field office in Nigeria. Dr. Tomlinson began his career at CDC in 2008 in the Division of HIV/AIDS Prevention, where his work focused on strengthening the capacity of the HIV workforce to implement science- and evidence-based interventions for HIV prevention, care and treatment. Dr. Tomlinson earned his bachelor’s degree in psychology from Emory University and his doctoral degree in clinical psychology from Duke University. He completed his residency in clinical psychology at the University of Maryland Medical Center and Baltimore VA Hospital. His published work addresses the epidemiology of HIV among men who have sex with men; the development, evaluation, and dissemination of interventions to reduce sexual risk behavior for acquisition and transmission of HIV; and the diffusion of innovations.

Surbhi Modi, M.D., M.P.H., is a Commander in the Commissioned Corps of the United States Public Health Service. Commander Modi is the Principal Deputy Director for CDC’s Division of Global HIV & TB. She previously served as Chief of the Maternal and Child Health Branch from May 2018 to June 2020. In her role as Maternal and Child Health Branch Chief, Commander Modi led work to improve outcomes for children, adolescents and pregnant and breastfeeding women living with HIV. Commander Modi also led the Division’s work to address global concerns about the safety of dolutegravir in women of reproductive potential. Commander Modi has worked at CDC since 2007 and in the Division of Global HIV & TB since 2008. In her 12 years with the Division, Commander Modi has worked as an Epidemic Intelligence Service Officer with the TB/HIV Team in the HIV Care and Treatment Branch, a Medical Officer with the Pediatric and Adolescent HIV Team, and as Lead of the Maternal and Infant HIV Team. Commander Modi earned her Master of Public Health degree in International Health Policy from the George Washington University and completed her M.D. and Preventive Medicine residency training at Emory University’s School of Medicine.

Matthew Bridwell, MPH, is the Acting Deputy Director for Management and Overseas Operations in CDC’s Division of Global HIV & TB. Outside of the temporary appointment, Matthew serves as Deputy Branch Chief for DGHT’s Special Initiatives Branch. In this role, Matt has provided leadership with focused efforts on managerial, operational, and administrative activities to enhance contributions to DGHT and PEPFAR. Matthew oversees DGHT’s Workforce and Career Development activities and team, as well as DGHT’s Innovation Hub. Additionally, he is the Division lead in coordinating and providing human resource support from CDC to the Department of State’s Bureau of Global Health Security and Diplomacy. Prior to his current role, Matthew served as a Regional Public Health Advisor with DGHT’s Overseas Strategy and Management Branch, where he coordinated support for the design and delivery of HIV and TB activities in the Central American and Caribbean regions and served as an official liaison between DGHT overseas offices and CDC headquarters.

Matthew earned his bachelor’s degree in public health sciences from Clemson University. He received his Master of Public Health degree from Emory University.

Josef Amann, M.D., M.P.H., is the Associate Director for Program in CDC’s Division of Global HIV & TB. Dr. Amann first came to CDC to serve in the Epidemic Intelligence Service in 2002. After completion of the fellowship, he served as Clinical Technical Advisor in the Sustainable Management Development Program. In this position, he worked with Ministries of Health in Africa and Asia to strengthen the performance and management capacity of HIV/AIDS, TB, and neglected tropical disease control programs to deliver effective and efficient programs and services. He joined CDC’s Division of Global HIV & TB in 2009 as a member of the HIV Care and Treatment Branch. Dr. Amann completed medical school at the University of Ulm in Germany and holds a Master of Public Health degree from Emory University.

Laura Porter, Ph.D., serves as the Associate Director for Data Integration and Analysis in CDC’s Division of Global HIV & TB. Dr. Porter has 20 years of experience in domestic and global public health, with technical leadership in monitoring and evaluation, surveillance, and survey design and analysis. She began working at CDC’s Global AIDS Program in 2004 as an epidemiologist on the surveillance team. She served as lead of the Monitoring and Evaluation team from 2007 to 2010, and chief of the Epidemiology and Strategic Information Branch from 2010 to 2016. Dr. Porter earned a Bachelor of Arts degree in 1988, with a major in Behavioral Biology, from the Krieger School of Arts and Sciences at the Johns Hopkins University and holds a Ph.D. from the Bloomberg School of Public Health at the Johns Hopkins University with concentrations in demography and epidemiology.