Claire Randall is to step down from her role as managing director of Lucknam Park in Wiltshire to take up a new position in February.
She joined the 42-bedroom country house hotel in 1999 after a six year spell as an inspector for the Michelin Guide, firstly as general manager before becoming managing director in 2010.
Working alongside chairman Harry Murray, Randall has secured a number of accolades for the five AA red-star hotel, including the Hotelier's Hotels Spa Hotel of the Year 2018 and the Independent Hotel of the Year Catey 2010.
Randall said that she would be revealing her new destination in the coming weeks.
She added: "Working with Lucknam Park has been the most amazing opportunity and I am immensely proud of all that we have achieved with my truly committed team, which has been made possible by the significant investment and support of the owners. I am of course very sad to leave but do so after a record-breaking trading year and some very rewarding accolades."
Harry Murray said: "Claire Randall was married at Lucknam Park in 1998 and when a vacancy at Lucknam Park for a general manager became available a few months later she applied and was appointed in May 1999. In July 2010 when I became chairman Claire was promoted to danaging director.
"On behalf of the owners, directors & myself we would like to thank Claire for her loyal service during past 20 years and wish her every success in the future."