Contract caterer Charlton House has won the deal to feed staff at London law firm Mayer Brown.
Under a three-year deal the caterer will manage hospitality services, previously run by Elior's Avenance, at Mayer Brown's Pilgrim Street office until February 2009.
After this time the law firm is relocating to a new site in the Broadgate development in the City at 201 Bishopsgate.
Services at the new site will include a staff restaurant for the first time, as well as hospitality, fine-dining, vending and a coffee shop for the firm's 750 staff and partners.
Kitchen Rat hears Charlton House pipped rivals BaxterStorey, Lexington and Harbour & Jones to the gig.