Mount, who will join the company on April 20, "will bring her considerable market knowledge and wine assessment expertise to Wine Intelligence".
The company says Mount will advise leading global wine businesses about product development and trading strategy and she will also contribute to WI's published research.
Mount said: "My focus and strength as a buyer has always been my ability to understand and interpret consumer trends and needs, and to translate these into clear messages on shelf.
"This appointment offers the unique opportunity to work with suppliers to ensure that their offer is right for the market, and to develop a strong communication platform for trade and consumer."
WI chief executive Lulie Halstead said: "Angela is that rare combination of a formidable businesswoman and a visionary when it comes to understanding consumer needs and desires."