Born in Lisbon, she started her ceramics studies at the António Arroio School in Lisbon where she was a student of Manuel Cargaleiro. As a student
she worked with Lino António. In 1954 she worked at the Cargaleiro studio at the Viúva Lamego Ceramics Factory. In the 1950's she worked with various
architects. She has various works in public and private spaces in Lisbon and in the Algarve, inter alia.
The work of Cecília de Sousa has explored all the potential of ceramics both in the design of panels and of loose pieces which take advantage of
textures, of the glows and of all the technical resources which individualise this artistic expression.