From Longman Dictionary of Contemporary Englishspeechwriterspeech‧writ‧er /ˈspiːtʃˌraɪtə $ -ər/ noun [countable] someone whose job is to write speeches for other people
Examples from the Corpus
speechwriter• Let them eat in the regular mess, with deputy assistants and speechwriters!• The Prime Minister needs better speechwriters, better advice-and better instincts.• Charlie Manganelli, our chief speechwriter, always included such a self-deprecatory line.• Very frequently, speechwriters are recruited from the ranks of journalism, which accounts for a great deal.• Well, as a rural westerner, I think Mark Helprin might not be the person Dole needs as his speechwriter.• The leaden hand of the Government's speechwriters set no pulses racing.• The speechwriters go back to work after his editing and bring him a new draft. 