Every year, more and more people in the workforce are involved in oncological rehabilitation. Although a lot of research has shed light on side effects of cancer treatment on the body, and even on its relationship with work, qualitative analyses in social sciences is still lacking. This article presents elements of reflection toward a better understanding of professional path, the consequences of the disease at the time of return to work and in the months after. It describes the side effects associated with cancer treatment, which have a lasting impact on work and create a gap between the person concerned and his/her professional environment. This article focuses on temporalities during the oncological rehabilitation process, broadens the reflection thanks to the notion of bifurcation and shows the stumbling blocks between the temporalities of work, the professional network and the person undergoing oncological rehabilitation.