Look for a job/careers section on business websites where you can find and apply for jobs.
https://www.wowcareers.com.au for Countdown
You can also find job vacancies on a number of sites such as:
- Seek https://www.seek.co.nz/
- www.neighbourly.co.nz (you advertise your skills for hire to local community).
- Recruitment firms such as Kelly Services www.kellyservices.co.nz/