After leaving the NIH, Dr. Irwin served as Vice President for Research Services (and Interim Vice President for Clinical Trials) at the St. Jude Children’s Research Hospital (1999-2003), Associate Director at the Lombardi Comprehensive Cancer Center, Georgetown (2003-2005), Consultant and Managing Director for Science and Education at the American Association for Cancer Research (2005-2007), and consultant to several organizations, including the American Society of Clinical Oncology, since 2007.