Etienne is co-founder and CEO of SUMISU, a circular mobile marketplace for second-hand clothes. She founded her company with the goal of building a sustainable and circular form of shopping clothes, without harming the environment. 2018 she held a TEDx Talk, 2019 she was part of the renowned Forbes 30 under 30 List and her company has received many prizes every since; amongst others Hottest International Startup, Best Retail Startup and Best AI Startup Austria.