Some clients require candidates to already possess the following: (as a minimum)
At least 2 years operating experience in Coal Mining
Coal Board Medical
Surface Generic Induction
Black Coal Competencies
SGS BMA Induction.
If you are looking to get into operating in QLD I recommend viewing the following websites
http://www.miningcareers.com/
http://mines.industry.qld.gov.au/
http://www.theresourcechannel.com.au/
Some courses you will need to complete first !