Fisherfolk, including fishermen, fishmongers, fish traders, fish processors, and community members engaged in the fishing economy as brokers and sex workers, face structural, cultural, social, and economic factors that affect HIV risk, and many fishing communities are characterized by relatively high HIV prevalence. The 2010 Sierra Leone HIV Modes of Transmission Study and the 2011 HIV Surveillance on Fisherfolks in Sierra Leone report found HIV prevalence in fisherfolk to be 3.9% and incidence to be 560/100,000, both significantly higher than the general population. In 2022, ICAP at Columbia University partnered with the National AIDS Control Program (NACP) at MoHS, the National HIV and AIDS Secretariat (NAS), the Ministry of Fisheries and Marine Resources (MFMR), and the Unions of Artisanal Fishermen to conduct a policy-relevant formative evaluation to assess knowledge, attitudes, and preferences for health and HIV services amongst fisherfolk in Sierra Leone.