i'm not really sure of any official progress certification, though, i think the idea was tried for a while.
but there are web, classes and in some cases on site training from progress, distributors and consulting companies.
http://www.progress.com/openedge/services/education/index.ssp
you should also consider if you're after a progress certification or a progress based application certification, that could be very different.
not sure, but i think some applications have certification program, you could check with your vendor.