 In January 2005, Jordan was the inaugural Alfred G. Knudson Chair of Cancer Research at the Fox Chase Cancer Center in Philadelphia, PA.He has recently published work showing that estrogen, given at the right time, causes the destruction of cancer cells rather than feeding their growth.Jordan was the Scientific Director of the Lombardi Comprehensive Cancer Center, Professor of Oncology and Pharmacology, Vice Chair of the Department of Oncology, and the Vincent T. Lombardi Chair of Translational Cancer Research, Georgetown University, Washington, D.C., prior to moving to Texas.