Stefanus is a Director and Head of Business Development and Strategy of Sinarmas Agribusiness Group (Golden Agri-Resources Ltd). GAR is the leading and largest private palm plantation group in Indonesia with planted area of 534k ha. It has pioneered and adopted policies to reduce deforestation, greenhouse gas emissions and biodiversity loss, and has been accredited by RSPO, ISCC and ISPO for these effiorts. Stefanus has been spearheading the business development and expansion of the group in the Renewables and Biomass business, including the development of the renewable energy business in Europe and palm kernel shells export to Japan.

Stefanus holds a masters' degree from Cambridge University, UK.