I just finished one of the most grueling exams I've ever taken. Passing that exam from the Board of Certification for Emergency Nurses gives me the privilege of adding "CEN" behind my name. It basically means I am Board Certified and "professionally credible" as an Emergency Nurse. Kinda a big deal, at least in the circles I run in. I'll be adding BSN in there by June. Thaddeus Bartholomew RN, CEN. I like the looks of that.