Answer: collator

AnswerCrossword Clue
COLLATORSequencer
COLLATORCard-matching machine
COLLATORCompiler
collatorone who collates (to examine and compare)
collatorto compare (texts, statements, etc.)
collatorto gather, arrange, or merge in sequence (the pages of a report, data, etc.)
collatorto verify the arrangement of (book pages)