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:
www.neighbourly.co.nz (you advertise your skills for hire to local community).
Recruitment firms such as Kelly Services www.kellyservices.co.nz/
Helping students go directly into the workforce, have a look at these links and they will help identify job opportunities, give tips on writing a CV and prepare students for their job interview.