William Rucker has been named chairman of Marston's and will take over from interim chairman Carolyn Bradley in October.
Rucker is chief executive of investment bank Lazard and chairman of the UK Dementia Research Institute and a committee member of Cheltenham Racecourse.
He was chairman of Crest Nicholson from 2011 until March 2018.
Commenting on the appointment, Marston's chief executive Ralph Findlay said: "William brings with him extensive expertise, having advised a broad range of companies and chaired two publicly quoted companies. His skillset will further strengthen our existing board and add significant value in helping Marston's to deliver its future growth ambitions."
William Rucker added: "Marston's is a well-respected business and a leader in its field which is well placed to capitalise on current sector trends with a leading beer business, a balanced, well invested pub portfolio and growing lodge accommodation business. I look forward to working with the Board and wider executive management team to maximise the future opportunities open to the group going forward."