About

Leadership

Siteman Cancer Center’s cutting-edge facilities and nationally renowned staff would be nothing without the people who lead them. Our leadership team is comprised of doctors, some of whom have been with Siteman since its inception in 1999, who are committed to serving as a resource through ever phase of the cancer journey.

Timothy Eberlein, MD
Director

John DiPersio, MD, PhD
Deputy Director

Sam Achilefu, PhD
Co-Leader: Oncologic Imaging Program

Graham Colditz, MD, DrPH
Associate Director, Prevention and Control

Farrokh Dehdashti, MD
Co-Leader: Oncologic Imaging Program

Bettina Drake, PHD, MPH
Associate Director, Community Research, Outreach & Engagement

Susan Dutcher, PhD
Acting Director, McDonnell Genome Institute at Washington University

Nick Fisher, MBA
Executive Director of Research & Business Administration

Dennis Hallahan, MD
Professor and Chair of Radiation Oncology

William Hawkins, MD
PI – Pancreatic SPORE

Daniel Link, MD
Co-Leader: Hematopoietic Development & Malignancy Program; PI – Leukemia SPORE

Christina Longnecker, JD, MBA, BSN, RN
Vice President of Oncology Services

Jeff Michalski, MD, MBA
Medical Director, Clinical Trials

Lee Ratner, MD, PhD
Associate Director, Education and Training

Karen Seibert, PhD
Associate Director, Shared Resources

Sheila Stewart, PhD
Associate Director, Basic Science