Mr. Marr is a Program Coordinator and Technical Adviser with the Global Strategic Information Group in UCSF Global Health Sciences where he supports bio-behavioral surveillance projects, interventions to improve testing and linkage among MSM (Project Boithato), and capacity-building in HIV surveillance, data analysis, and data use. He is the primary data analyst and analytic adviser for programs in South Africa, including national surveillance of MSM and FSW. Additionally, he is the Project Coordinator for IBBS surveillance projects in Suriname and Jamaica.
Prior to joining UCSF, Mr. Marr was an Epidemiologic Investigative Service Fellow with Cal-EIS, working with the Alameda County Department of Health to improve HIV surveillance and reporting. While improving data quality at the county level, he also completed a thesis looking at the syndemic characteristics of syphilis and HIV. Additionally, he worked with the Alameda Probation Department to increase the use of available data to detect trends and potential interventions to decrease recidivism.

His international experience includes Peace Corps service in Kanye, Botswana where he strengthened the district-level reporting around HIV. This work led to an improved, evidence-based approach to the annual District Multi-Sectorial AIDS (DMSAC) plan. The project was lauded by the Ministry of Local Government, and Mr. Marr presented the methodology and provided digitized reporting tools to districts throughout the country; increasing the ability for districts to plan informed, localized strategies to combat the epidemic. In addition, he has worked in Uganda on an assessment of how clinics utilize mobile technologies to improve patient outcomes, and in Switzerland, looking at migratory patterns of refugees from Northern Africa.

Mr. Marr received his MPH in Infectious Disease Epidemiology from the School of Public Health and Tropical Medicine at Tulane University, and his BA in Biology from Boston University.