The higher intensity of labour observed in many agroecological farming systems is barely examined by science, particularly in terms of work organization. Our research on the French farm machinery cooperatives, based on the farming styles framework, allows highlighting a particular style of farm work conducive for the agroecological transition. Farmers, member of these co-ops, have developed a long-standing reliance on the peer-to-peer cooperation, gradually shaping a labour-intensive and collective style of farm work to make viable their conventional farming systems. They then have easily re-mobilized the structuring basis of their initial on-farm work organization, i.e. labour intensity and peer-to-peer cooperation, by orientating them otherwise to develop agroecological practices.