No such thing as volo officers here in NSW
there is a St John here but they can not transport or respond in emergency, they can attend sporting events, carnivals fairs and shows.
the EMS service is govt run and are the only one under legislation to attend emergency calls, we also do transports and inter-hospital retrieval / transports.
the service is slightly large, the second largest in the world.
we have over 750 ambulances not including the special response units, administration vehicles, motor bikes, snow area vehicles (hagglunds, skidoos etc) and the air wing (9 helicopters and 6 fixed wing)
of this there are around 450 ambulances on road each day, and this doesn't include the specialist vehicles etc.
the service has 3000 ambulance officers all employed, however we also have first responders that are in small rural communities, where the service sup[plies the vehicle, training and gear and uniforms to members of the community to respond in until the ambulance arrives, these first responders do not transport in anyway.
stay safe