Ben-Oni Ardelean started a career in politics in 2008 when he ran for a place in Romania's Senate, followed by a bid for a sit in the European Parliament in 2009, both on behalf of the National Liberal Party (PNL). In 2012 he got elected in the Parliament of Romania as a senator and in 2016 maintained his seat in Parliament switching position from senator to MP, a position he has held until the present day.