Restructuring has become almost permanent in many large companies subject to profound changes. This reinforces the need to support the reclassification and career paths. This article seeks to better understand how individuals subject to constraints of professional transitions can rebuild a career path and identify conditions for devices that support to facilitate reconstruction. Four case studies of employees are protected status from an experiment with a device support career paths implemented in a large service company. They are used to highlight the depth of the identity crisis engendered by the forced nature of the transition, despite the job security. Appropriate accompaniment to help reduce psychosocial risks, while supporting the career transition process. The conditions of effectiveness of such support are set out here.