He is publicly known for being a very tough negotiator.

They have a reputation as tough negotiators who avoid public attention.

Luckily, in my business, I've learned to be a tough negotiator.

The company has a reputation for being a tough negotiator.

This made him a tough negotiator on behalf of his clients.

Stephen was shown as a very tough negotiator and the negotiations finally ended in 1326.

Still, media executives concede that he is a tough negotiator.

Brown was also a tough negotiator over salaries, often refusing to give players raises despite strong performance.

The rapporteur has shown himself to be a tough negotiator over all these years.

Spencer is known as a tough negotiator, so I don't think you'll have much success getting him to back down.