For M.S. students, your advisor when you are admitted to KAUST is the Program Chair. For Ph.D. students, your advisor is your PI (supervisor) whose lab you have been accepted in to.
Yes, you can change your advisor. M.S. students are advised to do so if/when they begin their thesis or directed research. Ph.D. students do have the ability to change advisors, but the overall impact to the Ph.D. project, as well as the time left to finish the Ph.D., could be significant. This will have to be taken into account before approval.
M.S. students need 36 credits (combination of courses and research is specific to your program).
Ph.D. students need 6 credits of 300-level coursework and will earn dissertation research credit each semester until they defend (no minimum credits established, although there is a minimum residency requirement of 2.5 years).
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