Zubrod, an alumnus of the Georgetown Preparatory School (class of 1932), the College of the Holy Cross (class of 1936), and Columbia University College of Physicians and Surgeons (1940 class), served in the U.S. army medical corps during World War II, where he worked on a replacement for quinine in the treatment of malaria.
This position lasted briefly: he became clinical director of the National Institutes of Health in 1954 and became head of the Division of Cancer Treatment of the National Cancer Institute in 1956 and scientific director in 1961.
Here, he put an emphasis on the development of new chemotherapy agents and their use in clinical trials.
Zubrod's name is also connected to a widely used assessment scale for performance of cancer patients, the Performance Status of the Eastern Cooperative Oncology Group (ECOG) for Patients with Cancer (Zubrod scale).
Zubrod left the NCI in 1974, and became a professor and chair of the department of oncology at the University of Miami School of Medicine (now the Leonard M. Miller School of Medicine) and served at the director of the Florida Comprehensive Cancer Center.