Frankly speaking I will talk with you.
PetroRabigh is one of the good companies in KSA. Since it is Refinery and work their is almost regular. In addition, it is a way to work in Aramco itself.

But, since you are pure vegetarian, I think you will have a problem not in PetroRabigh but in all KSA. Just today I was talking with Hindu colleague (But he is not pure vegetarian) and he said the pure vegetarian face a problem to find food fits their believes. I think also there are some groups if there is a pan which one time meat was cooked on it, never they eat from this pan. If you are like this, It will be something difficult.

Mohammad Salaheldin
Mechanical Design Engineer
Jeddah, KSA