Tienko was a co-founder of Leapfunder, and is the current CEO. Leading up to this, he was active for years within the venture capital arm of Philips Electronics. At Philips he was involved in building and divesting a.o. Sapiens Neuro and Shapeways. During this period his focus area included all Europe and the U.S., and he was a mentor and jury member at the business plan competitions of Stanford, M.I.T. and Cambridge. Tienko received his basic training as a strategy consultant, where he specialized in complex M&A situations. Tienko is Dutch. He holds undergraduate degrees in Physics and Philosophy from the University of Oxford and an MBA from the M.I.T. Sloan School of Management.