Executive team

Jean-Marc Lieberherr – Chief Executive Officer

Jean-Marc joined Rio Tinto’s Diamond division in September 2005 after 15 years in international sales and marketing positions with LVMH and Unilever. He was appointed Managing Director of Rio Tinto Diamonds in 2013, with full responsibility for all activities, from mining to marketing. While in this position, Jean-Marc served on the Board of the World Diamond Council and was elected the first Chairman of the Diamond Producers Association. In February 2016, Jean-Marc has joined the DPA as its full time Chief Executive Officer.

Deborah Marquardt – Chief Marketing Officer
Deborah Marquardt

Deborah Marquardt is a strategic marketing leader with extensive experience in beauty and luxury, as well as the entertainment, media and digital categories. She joined DPA in 2016, prior to which she held senior marketing communications roles with leading global companies including L’Oreal USA, Time Inc, and PricewaterhouseCoopers.  Marquardt leads all U.S. activities for the DPA, with a focus on integrated marketing and media initiatives.  She and her team work closely with the U.S. diamond and jewelry trade, as well as the media, to promote the diamond category with U.S. consumers.