Check your local job posting in your area to see their requirements. In my area , at least 2 years of experience is required for per diem positions. Also check the minimum required hours required by the facility to make sure that it does not clash with your full time job. In my area, facilities are limiting their per diem positions because they found that their per diem staff were not picking up enough hours. Even though you are per diem, some facilities may require you to complete their yearly competencies and attend staff meetings.