concessionaire

one who holds a concession or a right granted (for example, by the government) to conduct a certain business

1920, Frederick Spencer Hamilton, The Days Before Yesterday From 1830 to 1871 there were public gaming-tables in Heligoland, and the Concessionaire paid such a high price for his permit that the colonial finances were in the most flourishing condition.

someone who runs a concessions stand typically selling food and drinks