Dr. Nicolás Fiz studied Medicine at the University of Navarre, graduating in 2002. He trained in the speciality of Traumatology and Orthopedic Surgery at Santiago Hospital in Vitoria-Gasteiz and during his residence there he worked part-time on research and on location work for Doctor Mikel Sánchez's Arthroscopic Surgery Unit. In 2007 he travelled to the United States where he completed his training at the New York Hospital for Special Surgery, focusing mainly on hip pathology.
From 2008 on he worked as an assistant in the Traumatology Service in the Santiago Apóstol Hospital, Vitoria-Gasteiz, and joined Doctor Mikel Sánchez's team as a medical assistant.
Later, in 2010, he took on a full-time role at the Arthroscopic Surgery Unit (UCA) and the Biological Therapy Unit (UTB). He plays an active part in developing PRP Technology for the different diseases affecting the musculoskeletal system. Likewise, he works with the UCA team on innovation concerning different surgical techniques and has co-authored a number of publications. He works together with the Biotechnology Institute (BTI) research team on animal experimentation work.
In 2009 he created, in partnership with Dr. Jorge Guadilla, the Hip Unit within the Arthroscopic Surgery Unit.
Throughout his career he has taken part in different congresses and scientific meetings. He has co-authored different papers gaining international recognition. He is a member of SECOT, the Spanish Orthopedic Surgery and Traumatology Society.