The Engie Tower is designed as a large sheet of glass, 200 meters high, folded vertically to the south and cut to the north in a gradual curve. This new shape, which changes appearance depending on the angle from which it is viewed, ensures its integration into a complex urban environment. Responding to the sun's path, this large sheet of screen-printed glass, designed to limit heat gain, rises from the east, peaks in the south, and descends in the west. The tower's geometry provides each level with vast panoramic platforms. Its design combines high-quality working conditions with functional efficiency.

Denis Valode (1946) and Jean Pistre (1951) founded their agency in 1977. Within 20 years, it became one of the largest in France. Its success was due in part to the reconstruction of the Lainé warehouses in Bordeaux and the construction of the L'Oréal factory in Aulnay-sous-Bois. Today, the two architects are particularly involved in the design of towers—in Saint-Denis, Lyon, Beijing, and Mumbai—and sustainable development. In La Défense, they are carrying out seven projects, including the Léonard de Vinci university center, Opus 12, and Engie B.