BACKGROUND: HIV prevention remains a global priority, especially in sub-Saharan Africa. Our research team previously developed an evidence-based peer group program for HIV prevention called (Friend to Friend). A community-engaged collaboration adapted the program for community ownership and implementation. Here we report whether this HIV prevention program, implemented by community volunteers, increased condom use among sexually active individuals in rural Malawi. METHODS: Three communities sequentially rolled out the program. Effectiveness was evaluated using repeated surveys. At Time 1, no community had offered the intervention. At Time 2, the first community had offered the intervention and two had not (control group). At Time 3, two communities had offered the intervention and one had not (control group). We used two condom use indicators; condom use frequency in the last 2 months (N = 776) and condom use at last sex (N = 880). For each indicator, the sample included all sexually active persons answering that question at one or more time points. Regression analyses were used to model the two condom indicators over time, controlling for demographic factors, UNAIDS HIV knowledge, safer sex self-efficacy and partner communication. RESULTS: This peer group intervention implemented by trained community volunteers increased both condom use indicators at Times 2 and 3. In the final regression models. Other predictors of greater condom use for at least one condom use indicator included younger age group (13-19), male gender, not married/cohabiting, high involvement in religiously affiliated activities, higher safer sex self-efficacy, and greater partner communication. Although the intervention increased UNAIDS HIV knowledge, knowledge did not predict condom use. CONCLUSIONS: This community engaged implementation study found that an evidence-based peer group program for HIV prevention increased condom use when delivered by trained community volunteers. Leveraging community strengths and human capital resources facilitated implementation of this effective HIV prevention program in rural Malawi. Community ownership and program delivery by trained local volunteers offers an innovative and cost-effective strategy to address ongoing HIV prevention needs without overburdening heathcare systems in sub. TRIAL REGISTRATION: Clinical Trials.gov NCT02765659 Registered May 6, 2016.