St John will recruit 158 additional frontline ambulance staff members by July next year, in the biggest recruitment in its history.
The move would improve service response times, reduce the number of single crews and improve patient and staff safety in 35 locations across the country, St John said.
The new positions would be funded by St John, Accident Compensation Corporation (ACC) and the Ministry of Health.
ACC had agreed to move from a model which saw St John invoicing the organisation for each accident related injury, to where it would now pay a fixed share directly to St John's national emergency ambulance operation.
In addition to funding for more frontline staff, the Ministry of Health had contributed to the Auckland 111 Clinical Hub initiative, which would help with the management of non-urgent incidents through telephone advice.