Find out how many step increments are in your classification here!
An annual salary increment may be awarded based on satisfactory performance up to the maximum of the salary scale. Any regular increment awarded for progression through a salary range is effective on the annual anniversary date of commencement of employment and in the case of reclassification following completion of twelve (12) months' satisfactory service (anniversary date is the first day of the first full month following appointment or reclassification) provided the employee has remained in the same classification; however, this anniversary date will be adjusted for any period of unpaid leave of absence and parental leave. This date is the anniversary date for subsequent progression in that same classification (As noted in section 4.5 of the DPMG handbook).
It is possible that some new employees start out between steps, but the salary scale above should give an idea where they fall.