Warren is the Director of Marketing for a Montana-based private company called Potentate  Mining  LLC, North America’s largest sapphire producer based in Montana. The Rock Creek Sapphire mine produces a magnificent variety of fine pastel-coloured sapphires. He is the founding director of Ontario-based Algonquian Diamond Counsellors International (ADCi), a rough diamond valuation and consulting firm that is currently under contract with the Quebec Government. ADCi’s majority shareholder is also involved in a number of African Government Diamond Valuation (GDV) contracts in Sierra Leone, Lesotho, Guinea, Liberia, and Angola.He is currently the Vice President of the International Colored Gemstone Association (ICA), an international trade organization whose raison d’être is the promotion of coloured gemstones on the global markets. In addition, he is the Senior Gemmological Associate with Watts, Griffis, McOuat Limited, which are Canada's longest-running independent firms of geological and mining consultants.He was formerly the Director of Marketing for Vancouver-based Tsar Emerald Corporation. Warren is also the President of Canadian-based  R. T. Boyd Limited, a family-owned company marketing coloured gemstones and diamonds in North America since 1956.