Ronald Winston, who played the Executive at Harry Winston Inc., recently announced his retirement from the position, and will instead employ the additional time to pursue his medical research on AIDS. Winston, 67, is conducting his research at a private foundation he set up 30 years ago. The additional time will also be used to complete writing a book entitled ‘King of Diamonds’. %% He will however, remain associated with the company as its honorary chairman. Ronald is the son of the founder of the retail jeweller.