Jobber
Jobber , noun
1.
One who works by the job.
2.
A dealer in the public stocks or funds; a stockjobber. [English]
3.
One who buys goods from importers, wholesalers, or manufacturers, and sells to retailers.
4.
One who turns official or public business to private advantage; hence, one who performs low or mercenary work in office, politics, or intrigue.