Care of Children Act 2004, s 27
Yes. Additional guardians can be appointed by the court, a parent, or any other person (such a social worker). In deciding whether to appoint an additional guardian, the court must treat the welfare of the child as the most important consideration.
The court or Oranga Tamariki may sometimes be appointed as a guardian of a child, if the natural guardians are not fulfilling their responsibilities towards the child.