Yayasan Sumatera Hijau Lestari (YSHL) is a conservation organization based in Medan, North Sumatra, established in 2019 with a focus on environmental education and community development. The organization works across science, policy, and field based programs to promote biodiversity conservation, including the protection of ecosystems such as Taman Nasional Gunung Leuser and endangered species like orangutans. YSHL aims to build a conservation oriented society by balancing ecological preservation with community livelihoods through sustainable development practices and locally grounded conservation approaches.