After persuading his degree and specialization from Serbia, he has spent many years abroad, improving his skills and deepening the knowledge, but also getting familiar with the latest trends and practices in the domains of surgery he was interested in. At the famous Canniesburn hospital in Glasgow, Nikola has had a chance to narrow his field of interest and to specialize in the areas by which this hospital remains highly reputed - plastic and maxillofacial surgery, but also surgery of hand and micro-surgery. He also had practices in hospital St.Andrew - London and Frenchay hospital - Bristol. After learning from the great experts in the field, Mr. Maraš introduced these methods into his work in Serbia, contributing to popularization of the new approach towards plastic and reconstructive surgery in his country.