A LinkedIn profile under Karl Sage lists CNES as an experience and places the person in Toulouse.

One LinkedIn search result identifies a Karl Sage profile connected with CNES and gives Toulouse as the location, alongside education at ENSIBS. This is a separate professional trace from the music pages. The available result does not provide enough detail to connect that profile to the recording artist, nor does it explain the person’s role. The strongest conclusion is modest: the name appears in more than one public professional context.