First, do you have an offer? If yes, share with us some details so that we give you our feedback. If not, go to LinkedIn jobs, bayt.com and gulftalent.com and apply there. Set up proper profiles and don't be lazy filling them with right information. Check also indeed.qa and visit the Careers sections of the biggest companies here. Also, on LinkedIn, befriend head hunters and recruiters in Qatar. There are plenty and they will be happy to add you.

That's it for now. Good Luck.