Looking at some of the previous comments I think that all forum members should keep Qatarisation in mind.
All expatriates are employed only until a Qatari is able to take over the position in full. I am aware that some people have been in Qatar for a great number of years. I was there for 17 years myself. It may be that if you become redundant you will be offered a different position (why waste experience).
Just keep Qatarisation in mind because as more Qataris become proficient, there will be less need for expats.