Trade unionism is far from obvious among managerial and professional staff in France. Nonetheless, some of them, with higher credentials than their elders and often employed in the private sector, are intensely involved within the CFDT, one of the largest French trade union confederation. This incongruous commitment derives from a sense that their work experience is intolerable or inconsistent with their personal moral values. In this regard, it often takes the form of an individual rebellion in the context of the deregulation of the collective system of employment and the deterioration of working conditions in France. In a word, getting involved in a reformist union enables them to keep working as managers or experts “in a different way”. However, the permanence of this union commitment is difficult, not so much because of anti-union repression but because of professional retraining and career issues.