negotiator

US /nɪˈɡoʊ.ʃi.eɪ.t̬ɚ/
UK /nɪˈɡoʊ.ʃi.eɪ.t̬ɚ/
1.

người đàm phán

someone who tries to help two groups who disagree to reach an agreement with each other, usually as a job:

:
Some very skillful negotiators will be needed to settle this dispute.