from 2002 to 2004 he was an official of the croatian government in the ministry of health and social welfare, as the deputy minister of health for professional medical affairs. the government appointed varga to a working group for preparation of negotiations for european union accession in 2007. in 2010 siniša varga became a member of the croatian social democratic party. after directing the croatian institute for health insurance from april 2012 to june 2014, the government appointed him as minister of health.