Contract caterer Charlton House has won a five-year £8.5m contract to feed public and staff at the Law Society's headquarters in London's Chancery Lane.
The contract, which will generate £1.7m in annual turnover, will see Charlton House manage a commercial restaurant, bar and reading room from 1 April.
It will also run the society's conferencing and banqueting services, as well as a staff refectory with a 250-person capacity.
Tim Jones, chairman of Charlton House, said: "We couldn't ask for a more prestigious addition to our portfolio. This is a commercial contract, and we believe that our proven performance at other commercial contracts, such as the Royal Institute of British Architects, contributed to the Law Society's decision to appoint us."
The Law Society is the representative body for more than 100,000 solicitors in England and Wales.
By Chris Druce