Miller joins Red Tractor from Heineken where she was head of media and sustainability and responsible for driving the communications response to the UK-wide shortage of CO2 during the hottest summer on record.
She also led on its Brewing a Better World stakeholder and sustainability strategy.
A former staffer to Boris Johnson, Miller has also led on crisis communications, media engagement and a range of high impact campaigns for Tesco, including food quality and embedding the Grocery Suppliers Code of Practice across the business and with stakeholders and supplier partners.
Jim Moseley, Red Tractor CEO, said: “Rebecca represents an exciting step forward for Red Tractor. With a background in retail, London politics and working for an international cider, beer and pub business, she has been involved with some of the biggest corporate and news moments of the last decade.
"As the UK enters into this unprecedented period of uncertainty, there has never been a more important time for Red Tractor, one of the world’s leading food assurance schemes, to help British shoppers understand which food is produced to the highest standards of food safety, animal welfare and traceability.”