The marketing and communications director who oversaw the opening of billionaire diamantaire Lev Leviev's retail stores has resigned from the company and will relocate to Europe. Celine Assimon started with Leviev in 2006 and was responsible for the company's marketing, events and overall communications. She worked on the openings of Leviev's new retail stores in London, New York and Moscow, and facilitated marketing partnerships and events.

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