"We've already heard from some fantastic candidates looking for an opportunity for a clinical career in London and we have a lot to offer."
ABC News reported the London Ambulance Service was interviewing more than 200 candidates in five cities across Australia and New Zealand.
The service offered support and benefits for New Zealand staff moving over, including assistance with relocation and visa costs.
St John's acting operations director Derek Liefting said they were aware of the London Ambulance Service's recruitment drive.
"Our paramedics are highly skilled so it's understandable that they are in demand internationally," he said.
"For paramedics looking to work and travel this provides a good opportunity.
"It goes both ways -- just as many paramedics from the UK are coming out to New Zealand for work opportunities and lifestyle choice."
He said St John was looking within New Zealand and abroad to fill the 158 new positions and close ties with tertiary providers would help deal with attrition rates.