Professor Johnson recently retired as Chairman of Glebe Mines Ltd., the principal fluorspar-barytes mining company in Western Europe, and is presently the Chairman of Land Regeneration Management Ltd. and Ettrick Holdings Ltd., companies that are connected with land management or mineral extraction. Professor Johnson is a member of the Board of Directors of Free State Diamonds SA, and is the founder of KimCor Diamonds plc, an AIM-listed company. Professor Johnson, the author of 2 books and over 150 technical papers, holds (or has held) a number of advisory positions with professional institutes, national governments, international agencies and funding organizations, including the World Bank and the United Nations (Environment Program), and is retained as an external advisor on environmental matters to several international mining companies, including Rio Tinto plc and New Boliden-Outokumpu. Professor Johnson is particularly experienced in the scoping and management of environmental assessments and audits, the implementation of environmental management strategies in the mining industry and the development of programs for the restoration and re-vegetation of decommissioned mine sites.