Dr. Diaz is recognized world wide for his treatment of brain aneurysms and vascular disease of the head and neck. He is one of only several neurosurgeons in Michigan skilled in radiosurgery using the advanced technology Gammaknife for the treatment of tumors and other abnormalities. Listed among the best surgeons in the United States, Dr. Diaz is a frequent speaker to audiences around the world on advanced neurosurgical procedures and treatments. Dr. Diaz has holds prominent positions of leadership including his current role of Professor and Chairman Neurological Surgery Department for both Beaumont University School of Medicine and William Beaumont Hospitals. He is also a lawyer and holds a master's degree in Administration. He served in the US Air Force Dr. Diaz is fluent in Spanish, French or Portuguese.