Between 1989 and 1994 Mr. Hernádi occupied various posts at the Kereskedelmi és Hitelbank Plc. and between 1992 and 1994 he was its Deputy General Manager. Mr. Hernádi was Chief Executive Officer of the Central Bank of Hungarian Savings Cooperatives between 1994 and 2001 and member of its Board of Directors between 1994 and 2002. Between 1995 and 2001, Mr. Hernádi was a Board member of the Hungarian Banking Association. Since 2001, he is member of the European Round Table of Industrialists. Since 2007 he has become honorary citizen of Esztergom, and since September, 2009 he has become the honorary citizen of the Corvinus University of Budapest. In 2010 he has been honoured with the Hungarian Order of Merit – Commander with Star Award. Since March, 2016 he has become honorary citizen of Százhalombatta. In 2017 he has been appointed as a member of the National Competitiveness Council. In 2018 he has got the Titular University Professor title from Corvinus University of Budapest. In 2019, he became honorary citizen of Miskolc and was elected Chairman of the Board of Trustees of the Maecenas Universitatis Corvini Foundation, the controlling entity of Corvinus University of Budapest.