Initially to start some ER's will let you ride in with just your' CPR card and valid RN degree. Most require at least an ACLS to get in and then get ready. Within the fisrt year and definitely by the second you havr ACLS, BTLS, TNCC, PALS, ECRN which comes later to answer the radio and if you decide to stay hopefully your' Trauma Nurse Specialty. It;s a crazy and great place to work!!