You can not get visa on arrival to any GCC based on carpenter profession neither can you get driving license. Companies who are in rush to recruit, issue visa's of carpenter etc to professional staff just to have them on board fast. For 1st year, you cant change profession but even after 1st year, the process is hectic. Ironically, the profession change from carpenter to engineer before issuance of visa is very very very easy but the lazy camels( PRO') makes things tough for staff by not doing their job on time which makes ppl suffer big time later on.