He completed his residency in pediatric surgery at the Ricardo Gutierrez Children´s Hospital and in 1988, joined the staff of Garrahan national Children's Hospital. In 1992 he completed a fellowship at the Fetal Treatment Center of the University of California, San Francisco where he confirmed his interest in fetal treatment and video surgery.
In 2001 Doctor Martinez-Ferro along with the CEMIC Surgical and Obstetrical Team performed the first fetal surgery in a patient with myelomeningocele in Argentina. Doctor Martínez-Ferro is currently the professor of surgery and pediatrics, Chief Division of Pediatric Surgery, at the Fundacion Hospitalaria Children´s Hospital in Buenos Aires. He is also part of the editorial board of other journals indexed in Index Medicus as "Fetal Diagnosis and Therapy" and the "Journal of Laparoendoscopic and Advanced Surgical Techniques ".
He is the recent past-president of the International Pediatric Endosurgery Group.
He is the author of the book "Neonatologia Quirurgica" (Surgical Neonatology), published in 2004.
He is a member of the editorial board of the Journal of Pediatric Surgery.
