Stewart Gilliland is to step down from the board of Mitchells & Butlers to focus on his roles as chairman of C&C Group and non-executive director at Tesco.
Gilliland joined the Board as a non-executive director in May 2013 and was appointed as senior independent director in February 2015.
The M&B board said it had already started the process to replace Gilliland and expected to make an announcement before the end of the year.
Chairman Bob Ivell said: “Stewart has played a key role in the continued successful development of Mitchells & Butlers and has been a very valuable, supportive and extremely helpful member of our Board. We wish him every success in his other board roles.”