The collection traces the professional activity of Henri Germond (1931-1994), a photographer based in Lausanne, specializing in the documentation of major construction sites and Swiss infrastructure. It includes series of photographs in both negative and positive formats, in monochrome and color, covering various subjects such as buildings, bridges, tunnels, dams, architectural models, and reproductions of artworks. The photographic campaigns, carried out between 1951 and 2001, illustrate projects commissioned by companies, architectural and engineering firms, as well as public and cultural institutions. The collection also includes albums of photographic prints documenting construction sites such as the Grande Dixence dam and various underground works, likely created as presentation tools. These documents reflect professional practices and the architectural and industrial evolution in French-speaking Switzerland.