After a seven-year stint at the De Beers Group that ended in 2014, during which as an Executive Director and an Executive Board Member he managed the transition of the DTC brand and helped secure the highest sales figures and strongest rough diamond pricing in the corporation’s 125-year history, Mahiar Borhanjoo joined the midstream of the diamond industry. He first served as Managing Director of Venus Jewels, one of the world’s largest diamond manufacturers, and then as President and CEO of UNI Diamonds, an innovative luxury ecosystem that provides mid-market financing and facilitates ethically sourced polished diamond sales downstream to retail, jewellery manufacturing and wholesale companies, using big data.

In 2024 he returned to the De Beers Group as Chief Commercial Officer, where he is currently positioning the world’s most prominent diamond producer for the fast-changing diamond market of the late 2020s and beyond. He presented De Beers’ vision during a CIBJO Jewellery Industry Voices seminar at the VICENZAORO Show in Vicenza, Italy on January 18, 2025.

The event was hosted by the VICENZAORO’s organiser, the Italian Exhibition Group (IEG), and is part of a joint CSR and sustainability educational programme for the jewellery industry, presented by CIBJO and IEG, which has been recognised by the Economic and Social Council (ECOSOC) of the United Nations.