Coming from an established family business in jewelry, Nikos studied Gemology at the Gemological Institute of America. After finishing he created his own brand, Nikos Koulis Jewels, in 2006. He started by selling in others shops and at exhibitions as a wholesale jeweler attracting the attention of retail clientele firstly in Europe then in his home country of Greece. Nikos Koulis opened his first store in Mykonos in 2014 the store did well and it sold to international clientele and a few months later, another store opened in Athens. The second was created in collaboration with the Stage Design Office of Stavros Papagiannis and Giorgos Kyriazis making the experience important for clients. The business continued to grow and expand pushing its online presence as well.