There are skillful teachers and unskilful teachers.
The skillful teacher who is a so-called professional is like the person who can do things like below.
a. He/She can find something important that is invisible usually for amateurs.
b. He/She can explain the meaning of these things.
c. He/She can show actual performance using these things.
I think things above are the minimum level of professional while there are diverse levels of professional. If you've had upper D level qualification of T.O.S.S Teaching Skills and Techniques Assessment System, you seem to have quite higher-level skills of teaching.