If you are interested in these types of roles, here are some links about where and what to study
Social Work – Recognised Qualifications
Health Promotion - Unitec Institute of Technology website - information about the Bachelor of Health and Social Development (Health Promotion) qualification - Health Promotion Forum of New Zealand - information about the Certificate of Achievement introducing Health Promotion - Manakau Institute of Technology - information about the New Zealand Certificate in Public Health and Health Promotion (Level 5)
Education New Zealand
SEEK – Courses Directory
FINZ – Education opportunities