This study aimed to obtain a comprehensive collection of ideas and opinions from the perspective of various professionals and support providers for cancer treatment and employment balance. We performed a focus group interview, and a model diagram was created using categories created via classification of important items. The focus group interview revealed six strategies aligned with seven issues concerning the support needed to balance cancer treatment and employment. These strategies suggested the importance of not only the way of directly connecting among several specialists but also the presence and the role of the coordinators with their own specialties. Workers with cancer need supportive advices after their initial diagnosis, when returning to work, and after returning to work. After returning to work, a number of problems resulted from the lack of advice at the time of diagnosis or when returning to work. These results emphasized the necessity for the development of early comprehensive system for integrated collaboration between medical institutions, workplaces and other occupational health institutions. The results suggest that a multi-profession collaboration model is necessary to support cancer patients staying at work, which includes the cooperation between medical institutions and their counterparts from occupational health and the patients’ employers.