Doctor of Nursing Practice (D.N.P.)/Nurse Executive graduates may elect to prepare for certification via the American Organization for Nursing Leadership (AONL)TM or the American Nurses Credentialing Center (ANCC). The Nurse Manager and Leader and the Executive Nurse certifications are offered through the American Organization for Nursing Leadership (AONL)TM. The Nurse Executive and the Nurse Executive (Advanced) certifications are offered through the American Nurses Credentialing Center (ANCC).