Staff at Oranga Tamariki voted overwhelmingly in favour of strike action against what they argue are low wages and unsafe workloads.
PSA members voted to reject a "disappointing" pay offer from management that they would have seen real wages go backwards in the environment of high inflation.
The action voted on included four strikes for PSA members covered by the collective agreement, beginning on the afternoon of Friday October 28.
The next strike would be exactly one week later and the final strike would be on Friday November 18 for an entire day.