Assessment for instructors should be identical as for captains: psycho group test, english, simulator, board interview and full medical.
1500 hours minimum and 500 hours instruction on one of their aircraft type.
Wilingness to move to Turkey and adapt, plus 3 or 4 years commitment.
There is a limiting cap on perrcentage of foreign employee, so they need to drastically increase their training capability to cope with the number of cockpit coming their way!