There are many organisations related to Women in Engineering that would welcome you to participate.
These groups hold regular events that you may be interested in attending:
Engineers Australia, Women in Engineering http://www.ieaust.org.au/
APESMA - Association of Professional Engineers, Scientists and Managers http://www.apesma.asn.au/
Women are IT - http://www.witwomen.org.au/
Go GIRL - http://gogirlwa.org.au/
If you have any other groups that could be included here, please let us know via the contact page.