The article discusses evidence for the existence of gain spirals between work engagement and both psychological and environmental resources. It demonstrates that task-related, social and intrapersonal gain spirals are distinct and relatively independent processes in work design. The mediating role of work engagement in gain spirals was tested using a three-wave design. Assumptions of the Conservation of Resources Theory (COR) about the tendency for an accumulation of resources are confirmed. Key resources that have been shown to facilitate the mobilization of additional resources include job control, work relationships and active coping.