a person or business that represents, or that manages or arranges the affairs of, another or others

person representing an organization or person in business

a person, business, that buys and sells (business shares etc) for others

financial expert

a state or law official

person who arbitrates

a person employed in diplomacy for her or his country e.g. an ambassador

politician, consul

separate entry below

person who negotiates

a person who makes arrangements for two people who do not meet at first

person acting as an agent

(of) a person acting as a link between (groups), especially to get agreement

person who negotiates

a public official with authority to hear and decide cases in a law court

person who arbitrates

(a document giving) authority to represent or act for another (especially in voting at an election)

agent

an expert in tactics

politician, consul

a person who controls games and competitions

person who settles dispute