Basically Public Bank or should I renamed it as Paria Bank do not have such structure. Their fresh graduates and graduate trainees are the same. If you just graduated, you will be put under Graduate Trainee for 6 months. Then PB will confirm you (provided you performed) with no increment. Then you have to wait for another 6 months to become senior officer with peanuts increment.

Their officer structure are as follows:

Headoffice Staff:

Graduate Trainee (GT) > Senior Officer (SO) > Accounts Manager (Lvl1)> Accounts Manager (Lvl2) > Assistant Manager > Senior Assistant Manager > Manager > Senior Manager > Deputy Director > Director / Head of Department > General Manager > Senior General Manager.
Branch Staff

Graduate Trainee (GT) > Senior Operation Officer (SOO) > Officer-In-Charge (OIC) > Business Manager > Branch Manager > Regional Manager. At this point most of the staff will reach their retirement. However, some of them also got transferred back to HQ. Their position will be as follows : Senior Manager > Deputy Director > Director / Head of Department > General Manager > Senior General Manager.