One who, or that which, prepares, fits, or makes ready.(noun)
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Use "preparer" in a sentence
""The preparer is a member of a recognized religious group that is conscientiously opposed to filing electronically.""
"But the idea of preparing the living being which produces the phenomenon would not enter his mind; and yet, if merely to observe a cell, a living microbe, the scientist needs a "preparer," how much greater must be the necessity for such an assistant when the subject to be observed is man!"
"Such a laboratory can only be the most perfect school, organized according to scientific methods, where the teacher is a person answering to the "preparer" graduate."