Dr. Yel currently serves as the Global Medical Director in Immunology at Baxalta US d research, and is board-certified in Clinical and Laboratory Immunology, Allergy/ Immunology, and in General Pediatrics. She previously held faculty positions at the University of California Irvine in the Department of Medicine and the Jeffrey Modell Center for Primary Immunodeficiencies and served as the Chief of the Pediatric Allergy/Immunology and Adult Allergy/Asthma Clinics, Director of the Fellowship Training program in Allergy/Immunology, and Associate Medical Director of the Functional Onco-Imaging Center. Dr. Yel also held research and clinical positions at Hacettepe University in Ankara, Guy’s Hospital and Great Ormond St Hospital for Sick Children in London, St Jude Children's Research Hospital and Le Bonheur Children's Hospital at the University of Tennessee, Memphis. She has been a member of various professional organizations in leadership capacities including the President of Orange County Society of Allergy and Clinical Immunology in California from 2004-2005, and Chair for the Basic and Clinical Immunology Committee at the American College of Allergy and Immunology