This Project SOAR report summarizes findings from a randomized controlled trial of Tsima ra rihanyu (“working together for health”), a three-year community mobilization program for treatment as prevention that aimed to address the social barriers to HIV testing and treatment in Mpumalanga Province, South Africa. In this report, the authors explore the types of gender norms that are salient for women and men, how these relate to HIV testing and treatment, and the pathways through which gender norms operate to affect women’s and men’s HIV service use and experience and perpetration of intimate partner violence.