This manuscript documents the development of an innovative individual-level peer navigation intervention “Salud y Orgullo Mexicano” (SOM) designed to increase linkage and retention to HIV care for Mexican men who have sex with men (MSM) in Chicago, Illinois. The intervention was developed via a modified intervention mapping process. Elements of two existing interventions were combined and refined with input from the Mexican MSM community, including informant interviews, an expert advisory board, and a design team. A manualized transnational intervention was developed via intervention mapping. A peer health navigation intervention “SOM” was created using intervention mapping and input from the focus community. Next steps include implementing and evaluating the intervention to determine acceptability and efficacy.