The deal, which Kudos claims is worth about £10m in turnover, will see the food and venue specialist manage all retail catering and banqueting at the venue.
The agreement cements a ten-year relationship between Kudos and CHW.
The venue is able to host nearly 2,500 delegates in its Great Hall and is suitable for events including corporate parties, conferences, concerts and weddings. It also houses 22 meeting rooms.
Jon Pryce, Kudos’s managing director, said: "The [partnership] extension is testament to the strength of the partnership between ourselves and the CHW team.
"Collectively, we have delivered some of most truly innovative events in the industry, providing food and service to a level that is fitting of such a unique venue."