'''Alexander Siffrin''' founded [[Key-Systems]] GmbH in October, 1998; he continues to work as its CEO.<ref>[http://www.linkedin.com/profile/view?id=1561306&authType=name&authToken=9Jfb&locale=en_US&pvs=pp&pohelp=&trk=ppro_viewmore Alexander Siffrin]</ref> | '''Alexander Siffrin''' founded [[Key-Systems]] GmbH in October, 1998; he continues to work as its CEO.<ref>[http://www.linkedin.com/profile/view?id=1561306&authType=name&authToken=9Jfb&locale=en_US&pvs=pp&pohelp=&trk=ppro_viewmore Alexander Siffrin]</ref> |