There are many facets to the NAS operation both in Riyahd and Jeddah. Pay scales vary considerably as do T's and C's. Some positions require the personnel to live in the Kingdom whilst others are on a rotational basis. Per diem is paid on top of salary generally in USD. Do your research thoroughly so you know exactly what you are getting yourself in for as you would with any position. As with all contracts there are good and bad aspects. Decide for yourself. The previously quoted salary figures are well short of the mark from my experience.