After starting as a journalist in the written press, radio and television, Nicolas Steil, producer and director, founded his production company, Iris Productions S.A., in Luxembourg in 1986. As of yet, he has produced or coproduced more than fifty fiction, animation and documentary feature films or international series in French, English, German or Luxemburgish.

When he was working at RTL Radio & Television he directed more than hundred hours of programming: news & current affairs, documentaries and game shows.

He staged five theater plays including the works of Ariel Dorfman,Woody Allen, Carles Battle Jordà and Jean-Louis Schlesser. His first feature film as a director was Réfractaire (The Undercover War) which he co-wrote and co-produced. The film won several prizes in international film festivals throughout the world and represented Luxembourg in the 2009 Best Foreign Film Academy Award race. In 2021, he directed his second feature film, Le Chemin du Bonheur, depicting the story of hidden child's resilience. Starring Simon Abkarian, Pascale Arbillot, André Jung, Michel Vuillermoz, Eric Caravaca, Brigitte Fossey, Mathilda May amongst others, the film was selected at this stage at more than thirty internationals festivals winning 6 awards.