noun (n)

• a person who brings order and organization to an enterprise(noun.person)

  Synonym:
  organiser, organizer
  

  source: wordnet30
• a musician who adapts a composition for particular voices or instruments or for another style of performance(noun.person)

  Synonym:
  adapter, transcriber
  

  source: wordnet30
• One who arranges.(noun)

  source: webster1913