Dr. Leonard Sender is Medical Director of the Hyundai Cancer Institute, and Division Chief of Pediatric Oncology for Pediatric Subspecialty Faculty at CHOC Children's Hospital in Orange, California. Further, he is Medical Director of Clinical Operations and Program Development and Director of the Young Adult Cancer Program at U.C. Irvine Medical Center's Chao Family Comprehensive Cancer Center, also in Orange.

Dr. Sender also serves as chairman of the I'm Too Young for This (i[2]y) Cancer Foundation and is the founding member and chairman of SeventyK.org, an adolescent and young adult (AYA) cancer advocacy foundation.

Dr. Sender's primary research interests lie in better understanding cancer and its impact on the AYA cancer patient. This interest is comprehensive and multidisciplinary, extending from epidemiological components and biological factors to the psychosocial impact of the disease.