He is the Chief of pediatric hematology/oncology and stem cell transplantation, and he is a professor of pediatrics. His work focuses on stem cell transplantation in bone marrow, the cellular and molecular biology of stem cell abnormalities in inherited bone marrow failure and Langerhans cell histiocytosis. Before joining the Children's Medical Center, Lipton held a fellowship in pediatric hematology/oncology at Children's Hospital and the Dana Farber Cancer Institute in Boston. His performed his residency also at the Children's Hospital in Boston, and attended Saint Louis University School of Medicine for his MD and PhD training.