A tribute to Robert Croyle, PhD, Director, Division of Cancer Control and Population Sciences.

At the beginning of Dr. Robert Croyle's 18th and final year as director of the National Cancer Institute's (NCI) Division of Cancer Control and Population Sciences (DCCPS), before his retirement in December 2021, it is fitting to review some of his and the division's many accomplishments and pay tribute to him as one of the government's most effective leaders. The focus of this article is on Dr. Croyle's contributions in the behavioral and related domains and his and the division's impact on the landscape of cancer control and population sciences. Dr. Croyle joined DCCPS in 1998 as associate director for behavioral research. He became acting director of DCCPS in 2001 and then director in 2003. DCCPS is a formidable NCI division, with broad mandates and responsibilities and many partners from multiple sectors. The division conducts and supports an integrated program of the highest-quality genetic, epidemiological, behavioral, social, applied, survivorship, surveillance, and health care delivery cancer research. The division's notable successes in implementation science and the dissemination of evidence-based findings and products, use of cancer research consortia, and partnerships across National Institutes of Health and with external federal and nongovernmental organizations are among many that reflect Dr. Croyle's visionary leadership. © Society of Behavioral Medicine 2021. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.