Jason Almeida is to step down as commercial director of the Thai Leisure Group, operator of the Chaophraya and Thaikhun brands.
Almeida joined the Ian Leigh-led company in August 2011 and has helped it grow from four to 19 sites.
He was previously operations chef at Loch Fyne Restaurants.
It is thought he is looking to stay in the sector.
The company, which passed the £30m turnover mark last year, hopes to add eight to 10 sites in total this year, the majority under its Thaikhun brand and has lined up further openings for Thaikhun in Leicester’s Highcross scheme; the Westmark scheme in Southampton; intu Watford; Exeter; Cardiff and Bath.