Sandra Winarsa has worked in several development sectors such as renewable energy, environmental education, youth social-green entrepreneurship, and climate change. Since 2012, she has been responsible for leading Hivos' portfolio in sustainable energy and one of them is the multi-actors Iconic Island initiative. The initiative aims to provide the population of the medium-sized Indonesia island of Sumba with 100% renewable energy as a driving force of development focusing on decentralized solutions at remote villages.