hi,
a simple google search did the job.
Have a look here:
ZVK.ORG - Deutscher Verband für Physiotherapie
It's even in English.
However, to work in Germany (or to find a job), not only do you have to learn German, you have to be fairly fluid in conversational German. The local dialects are often very strong and will do there "thing" to make it difficult to communicate.
Good luck,
Fyzzio