assessor

noun
1
an expert in a particular subject who is asked by a court or other official group to give advice
ارزیاب, کارشناس, کارشناس رسمی
2
a person who calculates the value or cost of something or the amount of money to be paid
ارزیاب, ممیز, محاسب, برآوردگر, ارزشیاب
an insurance/tax assessor
3
a person who judges how well somebody has done in an exam, a competition, etc.
ارزیاب, داور
College lecturers acted as external assessors of the exam results.