Registered nurses have the option of becoming certified in gerontological nursing. National nursing organizations such as the American Nurses Credentialing Center and the Canadian Nurses Association offer certification in gerontological nursing. Requirements for maintaining certification vary. The American Nurses Credentialing Center lists requirements as including 2 years experience as an RN, 2,000 hours of clinical experience and 30 hours of continuing education, both within the specialty of gerontological nursing. Post graduate certificates in gerontological nursing are also available by completing continuing education courses through colleges and universities.