This document summarizes a decade of German development cooperation supporting workplace health programs in developing countries. It discusses 49 projects that reached over 1.9 million employees through partnerships with companies. Key results included 95% of companies introducing HIV workplace policies, 79% of employees receiving HIV testing and counseling, and 77% of programs reducing HIV-related misbeliefs. Programs were later expanded to include other health issues like malaria, tuberculosis, and mental health. Support was also provided to business associations to promote health regionally and nationally, reaching more companies. Workplace health programs provide a cost-effective way to scale up health services and have potential to address emerging issues like non-communicable diseases.