PSA Lead Organiser Joe McCrory says staff need a real cost of living increase, and support for safer workloads.
"Oranga Tamariki will not successfully fulfil its purpose without addressing the elephants in the room - soaring vacancies, withholding recruitment, and failing to retain experienced kaimahi," he said.
PSA National Convenor Helen Foley said a better offer needed to be on the table, arguing the "current cost of living crisis makes the existing issues with recruitment and retention of staff even more difficult to manage".
PSA Hinonga Māngai Māori (National Rūnanga Convenor) Bronny Pegler said the organisation would struggle to keep vital support for communities without better pay and recognition of "cultural leave".
Minister Kelvin Davis said that he understood "Oranga Tamariki is engaged in a collective bargaining process".
"My expectation is for the parties involved to work constructively to a resolution to avoid a disruption to services.
"The negotiation is between the two parties involved and I cannot comment further at this time," he said.