WHO IS DPA DIAMOND CONSULTING ? Dave Anderson formed the company in July 2003 after having worked in and managing Diamond production plants offshore and overseas for the past 10 years. Working locations include offshore South Africa and Namibia, and overseas locations include USA, Canada and Angola. In addition to this, 5 years of Diamond Evaluating experience was gained with CSO Valuations. The decision was made to work independently and offer local and international companies the benefit of experience gained in these locations.