Arieh dedicates himself to using finance as a force for good. In 2015, he co-founded to.org, an accelerator for the earth's most vital ventures. As Chief Investment Officer at to.org, Arieh directs investment strategy and works closely with the fund's portfolio companies. He is based between Switzerland and Senegal, where his family's agro-industrial business, the Groupe Mimran, has been committed to socioeconomic development for two generations. Arieh became involved in the family business at a young age, working closely with his brother Nachson. In 2012, Arieh helped create the Fondation Marie-Louise Mimran, a charitable foundation devoted to healthcare, education, and athletics in Senegal. Arieh built the Groupe Mimran family office and investment program. As Chief Investment Officer, he directs strategy and allocation across the global portfolio of operating companies and diversified financial investments. He serves on the board of various Groupe Mimran companies, including the Compagnie Sucrière Sénégalaise, the largest private-sector employer in Senegal.