Searcys has secured the first new contract wins since its acquisition by BaxterStorey parent company Westbury Street Holdings.
It has been appointed to provide catering at Kenwood House and the National Army Museum as well as securing an extension to its contract at the Honourable Society of the Inner Temple. All of the deals are for five years.
The National Army Museum in Chelsea is to re-open after a £23.25m re-development project in 2016. Meanwhile, the Searcys will be on site at Kenwood House from 1 October 2014, where it will operate the Brew House Café .
Searcys managing director Chris Maddison said: "We're very proud to add Kenwood House to our repertoire of some of the finest establishments in England and we're really looking forward to working with English Heritage to further build on the popularity and reputation of this superb visitor attraction over the next five years.
"The Brew House Café will celebrate the very best of English produce and dishes; we've created a range of seasonal menus which offer fantastic value for money and recognise the importance Kenwood House plays in the culture of the local community."