Rainer was born and raised in the US by a German mother and Spanish father. He has lived and worked on three continents and gained experience in both the import-export business as well as the non-profit world. He has a masters in international affairs from the Graduate Institute of International and Development Studies, Geneva.
He has been working for Initiatives of Change International since 2012 where he is the Chargé de Mission. He represents the work of IofC to the UN and International Geneva as well as is the coordinator for international partnership. He is living in Switzerland.