Using Titles in Germany?
Actually, these are not titles.

The only academic titles that are used in Germany in writing or conversation are Dr. (also Dr.-Ing.) and Prof. (sometimes MSc and more rarely BSc and also there has been Dipl. which, of course, is still in use). 

No one would ever use certificates or memberships in their name. This would look extremely strange in Germany. Also, one usually does not introduce yourself as "Dr. X" or "Prof. X" (you may want to use these on letters or emails signatures, though).