The Boisseau family is a family of French organ builders in the 20th century. Robert Boisseau (1909-1979) and his oldest son Jean- Loup Boisseau (*1940) built many new organs and did a number of restorations. The latter associated himself in 1980 with his former employee Bernard Cattiaux . Grandson Jean-Baptiste Boisseau (1965-2022) followed the path of his (grand)father and created with Jean-Marie Gaborit the company Béthines les Orgues. Bernard Cattiaux (*1955) is a pupil of Jean-Loup Boisseau and was associated with him during the years 1980-1998. In that period, they restored over 30 organs, among which the basilique Saint- Denis, Notre-Dame de Paris, la cathédrale de Poitiers et Saint- Sernin de Toulouse. They reconstructed the organ of the Royal Chapel of the castle of Versailles . He started his own company ( Atelier Bertrand Cattiaux) in 1998. Olivier Chevron (*1967) worked at the firm of Jean-Loup Boisseau before he created his own firm in 2002. His activities comprise both construction and restoration, inspirated by historic instruments while respecting the needs of the organist of the XXIth century. He built the organ of the Chapelle Notre-Dame du Saint Sacrement (2017). In 2019, the Bertrand Cattiaux Workshop became " Atelier Cattiaux - Olivier Chevron successeur" . Olivier Chevron took over the management of the Cattiaux company as the succession of Bertrand Cattiaux with the same team of production companions. Bertrand Cattiaux will accompany Olivier Chevron for a few years by ensuring the harmony of the next instruments.