I am the Executive Vice Chairman of the Department of Radiology and Faculty in the Division of Vascular and Interventional Radiology. I am board-certified in Diagnostic Radiology with addition subspecialty certification in Vascular and Interventional Radiology, I am also a Professor of Radiology in Surgery at Columbia University Medical Center. Previously I was the Vice Chairman of Radiology and Director of Vascular and Interventional Radiology at Mount Sinai Medical Center.