I have never seen a job advertised in nursing informatics. Nurses do these jobs if they are in an organisation and they move into the area due to need or interest, often called - quality officers. Informatics is often subjects in undergraduate or post graduate degrees, some universities may have tagged degrees, you may have to google, I have not seen or heard of one.
These type of positions are usually taken up by nurses with nursing experience, how else would they know what nurses need?
Our medical records and coding for funding are not done by nurses.
There are groups interested in informatics here is one link, but again by experienced nurses only http://www.hisa.org.au/members/group.asp?id=85335
here are degrees in public health and communityhealth but these do not require one to be a nurse, who may be more into health informatics
There are not many jobs available to non experienced nurses in Australia, one is expected to be a nurse first and then move into these areas.