* Chairman of the Supervisory Board of [[KeyDrive SA]] <br> (Holding of [[Key-Systems]]/ [[NameDrive]] Group) <ref>[https://profiles.google.com/siffrin#siffrin/about Current positions]</ref> | * Chairman of the Supervisory Board of [[KeyDrive SA]] <br> (Holding of [[Key-Systems]]/ [[NameDrive]] Group) <ref>[https://profiles.google.com/siffrin#siffrin/about Current positions]</ref> |