Work In, At or For?

Work In, At or For? Hello and welcome to Fransy Fancy English! Do we work in or at a shop? In, at or for a company? Let's get straight to it. People use the preposition "at" when the name of the shop, company or store is mentioned. "I work at Starbucks." "I work at McDonald's." "I work at Nike." "I work at the Pasteur Institute." "I work at City National Bank." "I work at Brown's Hotel in London." "I work at a Shell gas station." "I work at the John Radcliffe Hospital." "I work at Moscow University." Use "in" with career fields and departments. "I work in education/communications/advertising/HR as a …" "I work in the oil/medical/banking/music/film/tourism/auto/steel/computer/entertainment/business industry as a …" "I work in the healthcare/tourism/food/retail/finance/housing/energy sector as a …" "I work in the fi...