MCW Cancer Center Leadership

The MCW Cancer Center’s leadership team includes scientists, researchers, and administrators who provide strategic and operational oversight to shape our strategy, guide our programs and initiatives, and inspire our people.

Gustavo Leone Headshot_Newsroom

Gustavo Leone, PhD


Dr. Leone joined the MCW Cancer Center in April 2020. As a leader and scientist in the cancer community, Dr. Leone has nearly 30 years of research experience and more than 10 years of leadership experience, including former appointments as the Director of the NCI-designated Hollings Cancer Center at the Medical University of South Carolina as well as Director, Solid Tumor Biology Program, at the Ohio State University Comprehensive Cancer Center.

In addition to leading the MCW Cancer Center, Dr. Leone is MCW’s senior associate dean of cancer research and professor with tenure in the department of biochemistry. He holds the Dr. Glenn R. and Nancy A. Linnerson Endowed Chair for Cancer Research and oversees clinical operations at the Froedtert & the Medical College of Wisconsin Cancer Network.

View Gustavo Leone, PhD Bio

Mary Horowitz, MD, MS

Mary M. Horowitz, MD, MS

Deputy Director

Dr. Horowitz joined the MCW Cancer Center in 2021. Dr. Horowitz holds the Robert A. Uihlein Professorship for Hematologic Research at MCW and serves as chief scientific director emeritus of the Center for International Blood and Marrow Transplant Research, of which she is a founding member.

Dr. Horowitz’s clinical and research activities focus on the care and outcome of persons receiving blood and marrow transplants and in evaluating the role of transplantation in malignant and non-malignant diseases. She is particularly interested in understanding, treating and preventing long term complications of transplantation such as chronic GVHD (graft versus host disease).

View Mary Horowitz, MD, MS Bio

Leadership Team

Helping to direct the science at the MCW Cancer Center are eight associate directors (the Director's Council); an Executive Committee; and thirteen Faculty Research Committees that focus on disease-specific clinical research and external, internal, philanthropic leadership, and community advisory boards. This structure effectively promotes collaborative scientific interactions within the institution, external partners, and the community.

Associate Directors

Razelle Kurzrock, MD, FACP


Razelle Kurzrock, MD, FACP

Associate Director, Clinical Research

View Razelle Kurzrock MD, FACP Bio

Marilyn Larson, MBA


Marilyn Larson, MBA

Associate Director, Administration

Doug Rizzo, MD


James D. Rizzo, MD, MS

Associate Director, Oncology Operations

View James Rizzo, MD, MS Bio

Charles Rogers, PhD, MPH, MS, MCHES®


Charles Rogers, PhD, MPH, MS, MCHES

Associate Director, Community Outreach & Engagement

View Charles Rogers, PhD, MPH, MS, MCHES Bio

Hallgeir Rui, MD, PhD


Hallgeir Rui, MD, PhD

Associate Director, Shared Resources

View Hallgeir Rui, MD, PhD Bio

Melinda Stolley, PhD


Melinda Stolley, PhD

Associate Director, Population Sciences Research

View Melinda Stolley, PhD Bio

Xue-Zhong Yu, MBA, MS, PhD


Xue-Zhong Yu, MBA, MS, MD

Associate Director, Basic Research

View Xue-Zhong Yu, MBA, MS, MD Bio