STP operator my last project yet in Singapore as Slurry treatment plant (STP) operator STP operator and supervisorSTP operator and supervisor fourth project in tunneling field as operator and supervisor at the same time STP operator and supervisorSTP operator and supervisor machine type. Herrenknecht and flottweg plant (centrifuge) my third project in Singapore which is my first supervisor position. centrifuge operatorcentrifuge operator machine type. Herrenknecht and flottweg plant (centrifuge) my second project in tunneling field Assistance of STP operatorAssistance of STP operator machine type. kawasaki and filter press this is my first tunneling project in Singapore slurry treatment plant in short (STP) 10th10th