negotiator

He is a negotiator of considerable skill.

他是个谈判高手。

They have placed great trust in him as a negotiator.

他们完全信赖他进行谈判。

Will the negotiators be able to untie the Gordian knot?

这些谈判能够果断地解决这个难题吗？

Mr. Smith is a most suitable candidate for such negotiator since his tact and quickness of mind are equal to the occasion.

这样的谈判史密斯先生是最合适的人选, 他机智敏捷, 随机应变。