Take context from the input text and decide on the accurate relationship between 'Warren East' and 'Rolls-Royce' from the options provided.
Options: founded by, brand, industry, employer

Rolls-Royce Holdings Plc cut its full-year profit guidance and halted a share buyback to preserve cash, days after new Chief Executive Officer Warren East took over at the U.K. manufacturer of aircraft engines and marine products.
employer