Ghislain Rosmark followed a classic pastry training in France, participated in international pastry competitions and advanced to the semi-final of the prestigious French Competition MOF (Meilleur Ouvrier de France). He is the former chief patissier of the five-star hotel Le Royal in Luxembourg and is now responsible for product development patisserie from Steffen Traiteur, a catering company in full growth that delivers fine patisserie to the Luxembourg court. He is also a brand ambassador for Barry Callebaut and a member of the jury in numerous international pastry competitions.