Catriona Felstead MW, 36, is a marketing manager at Berry Bros & Rudd, Britain’s oldest wine merchant.
Felstead began her working life in a petrochemical company before her love of wine led her into the wine trade.
Berry Bros & Rudd now boasts six Masters of Wine amongst its staff.
Joining Felstead is Annette Scarfe MW, 51, an independent consultant, based primarily in London, Hong Kong, and Singapore, and Andreas Wickhoff MW, 35, from Salzburg, who becomes Austria’s third Master of Wine.
Lynne Sherriff MW, chairman of the Institute of Masters of Wine, said: “They have displayed all the qualities that make our members so special: talent, application, the ability to think differently and communicate effectively, and obviously the love of wine that unites us all.
“They collectively represent the best of the Masters of Wine in their breadth of experience both within and without the wine trade, and the international perspective that they bring us.”
Felstead added: “I am thrilled that four years of hard work and sacrifice has paid off.
“I thought that studying for the exams while pregnant was tough – but trying to concentrate on a dissertation with a new baby was a real challenge.
“I am so grateful to everyone who has supported me during this time.”