Mental health nurses (MHN) are at the forefront of care and treatment within acute inpatient settings. Research suggests that newly-graduated MHN are unsure about the skills and knowledge that they are expected to possess, and are expected to practice at a level that they are not prepared for in their undergraduate courses; however, research focusing on competencies for newly-graduated MHN is scarce. This study aimed to identify competencies expected of newly-graduated MHN working in a regional mental health facility in New South Wales, Australia. Eight registered nurses (with varying levels of experience) participated in individual semistructured interviews. Four themes were identified, and termed: communication, safety, self-awareness, and treatment. Within these four themes, 14 competencies were described that detail clear aims for new graduates, provide a better understanding of mental health nursing, and promote specialized and competent practice in mental health.