Purpose -Cancer care is complex and an integrated cancer pathway involves many health professionals in a variety of care settings using many skills. The widely distributed and heterogeneous nature of the cancer workforce raises significant challenges with respect to professional development. Cancer Learning is a government-funded initiative designed to provide access to a wide range of quality online learning resources for all health care professionals involved in the care of cancer patients and their families. The purpose of this paper is to discuss these issues. Design/methodology/approach -A multi-phase project, led by a consortium of national stakeholders in cancer care, informed the design, build, and deployment of Cancer Learning; an online, evidence based, information and learning portal to support professional development of health professionals across the continuum of cancer care in Australia. An action research approach allowed for an iterative process of ongoing dynamic evaluation and improvement of this workforce improvement resource. Findings -The National Government Agency, Cancer Australia's Cancer Learning online hub has been supporting the professional development requirements of cancer care professionals since the site deployment in 2007. Since launch, site usage continues to grow and evaluations have been positive. Time constraints of health professionals continue to be a major barrier to sustained online learning participation. Originality/value -This research recount of the development and implementation of an Australia first national online learning initiative highlights the rigorous approach undertaken for the delivery of a quality evidence-based resource for the professional development of all health professionals involved in the delivery of cancer care.