in 30SCE u will become a plant engineer or field engineer.
as a plant operator, u will learn to operate vehicles like
tractors, excavator, shovel, forklift and dozers like those u see
at construction sites to support enginner operations.
it's a good life lah, no need to chiong suah, u move around in your
vehicle and dig with your vehicle, as compared to field engineers
they must run here run there dig by themselves. 
in 30SCE u won't be trained in other fields like what u mentioned
above as they belong to other engineers' units. if u are interested
they are,
30SCE 
plant engineers/field engineers
35SCE brifging engineers/amphibious
engineers
36SCE EOD engineers
39SCE CBRE engineers
u might still be able to be posted out, for instance u fail IPPT.
but i recommend staying on, cos all your friends are there.
