I draw on a historical analysis of the employers' boundary work in the French Disability Field to tackle the unemployment of disabled persons. I attend to understand the impact of a boundary organization on the dynamic of exclusion of disabled persons and the organizational responses. I explore the work of the GIRPEH in the French Disability Field to create, maintain or change practices, norms, and rules of the field since 1977 to 1987. Based on qualitative primary and secondary material and interviews, I find the boundary organization facilitates through stages the emergence of a common framework that bound actors; reshapes the division of work between actors; allows social innovation; promotes new practices and norms.