Which course you kenna?
http://www.mindef.gov.sg/joint/smm/courses.htmToo bad, but I think combat medic is a very generic vocation & you could be posted to a lot of places (like a signaller). With the line infantry, the Hokkien peng tends to accept you better than other formations - cuz you'll be carrying a M16 & manpacking the bulky stretcher alongside them. The negative side of this is that the SAF doesn't see you as a non-combatant.
With the other combat units, the assimiliation is less so by my estimation. You'll still be attached with the frontline troops, but those medics generally try to "siam" things a lot, wearing their BCS or medical-platoon status like a badge. My Arty experience saw a lot of problems trying to get our lot to dig shellscrapes & do field-sentry duties, etc.
Of course, if you get posted to a base camp or higher-level unit, then life is quite senang.