zaidi_rasmin,
I had a diploma in mechanical engineering
What did you do with it? 😀
Got any relevant hands-on experience to go with it?
Help yourself first, by reading the forums of this site and getting off your arse and door-knocking etc. Try locally first, and then look elsewhere. Relocate if necessary. Don’t expect anything to fall into your lap.
Research the companies your applying to, and read up on their systems and work-scope etc. There’s plenty of info out there, try looking yourself first!