After serving my sentence am I automatically on parole?

No. Parole is an option that is determined at sentencing by the judge. If parole is available to you, you would likely get a chance to reduce your time served and not have to do the entire bid inside. Not all offenders are given parole as an option in their Judgement and Commitment order. If you don't have that option you will do 85% of your sentence and then get released. You will immediately report to the Probation Office and meet your assigned Officer. You are then reporting to them until the court imposed probation is complete. The length of your probation or supervised release will be predetermined. Violation of the probation never has a pleasant outcome.