Instructor/Coordinator.
I have seen it many times as well, and have asked, and that is the response I get. I guess EMS is so concerned about vanity that we even have to have a post-nominal addition for being a teacher. I think it is plain silly and a little over the top.
If you are a paramedic, say your are a paramedic. If you are an EMT, say you are an EMT. You do not see nursing professors with "Jane Smith, RN-IC" or professors of medicine "Janet Robertson, MD-Professor".