Istvan set up the independent ad agency White Rabbit Budapest with his partners in 2006. His creative work won him awards like D&AD, Cannes Lions, One Show, ANDY Awards, Clio, LIA, ADC, The Immortal Awards, Eurobest, Webby Awards, ADC Europe, ADC Germany, Shark Awards, New York Festivals, Cresta, Epica, AME Awards, Communication Arts, One Screen, AdAge, AdStars, Golden Drum, White Square, KIAF, Chip Shop and more than 10 Effies - including the first ever Hungarian Effie Grand Prix, a German Effie Grand Prix and a gold at the Euro Effie.

He was a member of the jury at the D&AD, One Show, ANDY Awards, Clio, LIA, New York Festivals, Webby Awards, Young Ones, Cresta Awards, Caples Awards, Cannes Young Lions, AdStars, Creativepool, Mobius Awards, Lovie Awards, Golden Award of Montreux, Lisbon International Advertising Festival, Lisbon Health, Effie Awards Pakistan, WINA Festival, White Square, Newstars and jury president of Cannes Young Lions Georgia.

He is member of D&AD, The One Club, Art Directors Club Global, Art Directors Club of Europe and The International Academy of Digital Arts and Sciences, Mentor of D&AD New Blood Academy, LIA Coach and MadStars Global Academy Instructor, Examiner at VISART Academy Of Arts.

When he is not making ads, he likes to take care of his exotic houseplants or count clouds. He happily opens a bottle of wine to accompany any of these activities.