In some of the agencies I have worked for, the OASIS nurse is actually the nurse that does the OASIS reviews and verifies that the information on the forms flows well and meets the Medicare criteria. Often agencies want the OASIS nurse to become OASIS certified, which i hear is a bugger, but if they are willing to hire you than they should be willing to train you on the OASIS and assist you in getting the appropriate education. GOOD LUCK!!