Project summary Career Goal: My career goals in the original NIH Pathway to Independence Award (K99/R00) application were to secure a tenure-track faculty position in a university where I can develop a research program focusing on HIV prevention for networks of men at risk for HIV. Tenure-track Position at George Washington University: On October 1, 2020, I started a tenure-track faculty offer for at George Washington University Milken Institute School of Public Health in the Department of Prevention and Community Health Promotion where I will complete the R00 phase. Research Project: The transfer to George Washington University will not affect the project in any negative manner. The next phase of the project includes a qualitative follow-up study with a sub- group of men who participated in the intervention arm of the cluster randomized controlled trial conducted as part of the R00 phase among men in Tanzania. Specific Aims: The original specific aims for the R00 phase were to: 1) develop the content for a peer-led HIV self-testing (HIVST) for networks of men in Tanzania; 2) assess the acceptability, feasibility, and efficacy of a 1-month unsupervised HIVST intervention on HIV testing among networks of men in Tanzania and; 3) conduct a qualitative follow-up study among a sub-group of the participants from the intervention arm. Primary Outcome: The primary outcome is any uptake of HIV testing measured by the return of a used HIV-self testing kit or observed HIV testing. Secondary Outcomes; The secondary outcomes are uptake of HIV self-testing, self-reported HIV testing, and linkage to care. Independence: A team of senior mentors at George Washington University including current, Drs. Deanna Kerrigan and Lisa Bowleg at George Washington University will mentor me to help me prepare R-level grants based on the findings from the R00 project.