Ambulance officers will strike for a second time at the end of the month after rejecting a pay offer from Hato Hone St John.

More than 1000 officers will strike for 24 hours on 27 and 30 September.

The industrial action followed rolling strikes by ambulance workers and call takers in August - the first time they had ever taken strike action.

Ambulance officers have been negotiating over pay and conditions with the employer, St John, since their collective agreement expired in December 2023.

First Union had rejected a settlement proposal by St John.

First Union organiser Faye McCann said the offer from St John included minimal pay increases, below the rate of inflation.

Ambulance officers would continue to leave the workforce if a fair pay agreement was not reached, she said.

"They're burnt out, they're underpaid, and they're not being listened to by the government or St John.

"They need better working conditions and this is the action that they're having to take to be heard.

There was a major funding gap and a critical need for a fully funded ambulance service, she said.

"It's very peculiar for us to hear that the government won't step up and fully fund the ambulance service when that's what the public needs, that's what the staff need.