Best bit of advice I can give you is to venture into the Middle East forum and have a look at the multitude of threads in there on Qatar. You'll get the heads up on recruitment procedures, accomodation, lifestyle et al.
It is an eye opening Forum/thread
http://www.pprune.org/middle-east/36...egulation.html
http://www.pprune.org/middle-east/36...mt-pilots.html
http://www.pprune.org/middle-east/36...ps-please.html
http://www.pprune.org/middle-east/35...-question.html
Lots more like this in there............................enjoy!!!