Is this cyberbullying?

[WRB]

That is most definitely cyberbullying. His account needs to be removed and his entire IP address blocked from having to come back on there and abuse you like that again. You need to contact the admin of that site and send in a request--I'd spam their inbox with requests if they don't answer your first one right away--to have his account removed because of what he is doing to you.

If he were on the site that I am a supervisor on his account would be blocked and the information on his profile removed completely. There's no reason nor any excuse for his kind of behavior on there.