Sysco is the biggest, it just merged with US foods too so bear in mind those jobs at US Foods just became super volatile- My mother WAS a senior purchasing manager there and now she's looking for a new job if that tells your anything. Smaller in the NE are Maple-vale farms, Briden Foods ect.
Ever worked food service delivery?
Pretty tough job. Typically good pay, but it's commiserate with the considerably large amount of physical work you'll be dealing with- and the fact that you have to know the area you're servicing like the back of your hand.