Prior to joining the firm, Demetrovics spent a few years at BBD Enterprise in leadership positions. Before that, he spent 11 years at KPMG, but began his career at PricewaterhouseCoopers.
He graduated from the legal predecessor of Corvinus University of Budapest in 1997 as an economist, gained a tax expert certificate in 1999 and completed his postgraduate legal studies at Eötvös Lóránd University in 2001.