A long-term partnership among the Butaro Cancer Center of Excellence (BCCOE) in Rwanda, Partners in Health (PIH)/Inshuti Mu Buzima, and Dana-Farber Cancer Institute (DFCI) supports the development of oncology nurses through a clinical nurse educator role. Two senior Rwandan oncology nurses at BCCOE were hired as nurse educators and were mentored by a PIH/DFCI oncology nurse educator using the accompaniment approach. The formalized mentorship process included long-term accompaniment for all educator projects spanning staff training, quality improvement, research, and clinical practice, as well as development of nurse educator competencies and creation of a repository of resources.