I have an identity crisis: I just earned my PMP credential, and now I am not sure how to refer to myself.
In what situations is it appropriate to refer to myself now as "William J. Marshall, PMP"? My initial thought was to only refer to it in the most formal of situations (e.g., resume, business cards, etc.), but I'm not sure.
So, I would like to toss the question to the community and learn from your experiences. I don't want to come across as braggish or pretentious, but neither do I want to downplay the PMP credential.