How could I translate in German on a self-evaluation form for interviews that says "strong professional manner" at for example customers?

Thanks!

Who's professional? the customer? don't get the context

"Verhält sich immer professionell"?

"Professioneller Auftritt" or Erscheinung

hochprofessionelle Einstellung (more attitude) or Erscheinung (more manner)

Why does that post give me the giggles?

You might also want to add on the self evaluation that your German is poor and you often turn to the internet forums for support...

2 posts qualifies as often does it? Given my german is damn near fluent, I guess that gives native German speakers a fair rating according to your scale.

And thanks for the responses. I'm going with sarabyrd's one using Erscheinung.

Because you're spaced out organizing the St. Patrick's Day parade and need an innocent vent to your exuberant emotions.

Sarabyrd, Irishmen have NO emotions. They just get the job done.

Ausgeprägte professionalle umgang i would say

Or even ausgeprägt professioneller Umgang.