Hi ezmarth, what was your sentence? Did you receive a term of imprisonment of less than 6 months?
If not, the offence will likely become spent after 10 years and now show on your record. I'm not sure whether this would come under a NSW or Federal offence however Federal spent convictions are those for which sentence was less than 30 months in prison and NSW is 6 months.
However the removal of a need to disclose the offence does not go away entirely: a spent conviction does not apply to some jobs including: a judge, magistrate, justice of the peace, police officer, member of staff of Corrective Services NSW, teacher or a teachers aid. Also, some crimes remain on your record forever - for example if you are sentenced to more than 6 monhts imprisonment or if its a sexual offence in nature.
Check out this link for more info:
http://www.legalaid.nsw.gov.au/__data/assets/pdf_file/0003/15195/Spent-Convictions.pdf