A "labor negotiator" is someone who helps settle disputes or issues between workers (labor) and their employers. They work to find agreements or compromises that benefit both parties during discussions or negotiations. Full definition
His role as chief labor negotiator for the baseball owners during the 1994 labor dispute ended in failure and frustration. (nymag.com)
RIP James F. Hanley, who started work as a union electrician and went on to become New York City's chief labor negotiator for nearly 15 years. (nystateofpolitics.com)
The unions are there as labor negotiators and represent teachers in that capacity — I would not want them meddling in teacher preparation. (eduwonk.com)