Middleman

n.	1.	An agent between two parties; a broker; a go-between; any dealer between the producer and the consumer; in Ireland, one who takes land of the proprietors in large tracts, and then rents it out in small portions to the peasantry.
	2.	A person of intermediate rank; a commoner.
	3.	(Mil.) The man who occupies a central position in a file of soldiers.

Noun	1.	middleman - someone who buys large quantities of goods and resells to merchants rather than to the ultimate customers Synonyms: jobber, wholesaler
	2.	middleman - the performer in the middle of a minstrel line who engages the others in talk Synonyms: interlocutor
	3.	middleman - a person who is in a position to give you special assistance; "he used his business contacts to get an introduction to the governor" Synonyms: contact

arbitrator, chandler, connection, contact, deputy, entrepreneur, front, front man, go-between, importer, interagent, interceder, intercessor, intermediate, intermediate agent, intermediator, intermedium, internuncio, interpleader, intervener, interventionist, interventor, jobber, liaison, link, marketer, mediary, mediator, medium, merchandiser, merchant, monger, mouthpiece, negotiant, negotiator, negotiatress, negotiatrix, ombudsman, regrater, retail dealer, retail merchant, retailer, shopkeeper, spokesman, spokeswoman, storekeeper, tie, trader, tradesman, tradeswoman, trafficker, wholesaler