Educated as an economist (Cum Laude) Ruben Koekoek worked for nine years in several roles for ABN AMRO bank. In 2018 Ruben co-founded Social Finance NL, a social enterprise which serves as an intermediary between government, service providers and impact investors in order to solve social issues more effectively. Since 2011 Ruben serves as treasurer of the Dutch Jewish Humanitarian Fund and since 2017 as its chair. The Dutch Jewish Humanitarian Fund is an endowment fund which supports Jewish communities in Middle and Eastern Europe.