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Photo of Mr Douglas Collier
Mr Douglas Collier
Chemical EngineerBAppSc(Met) UNSW, MEngSc(ChemEng) Newcastle 1977. MMICA, MAusIMM (CP), MIMM, MAusCeramicSoc, CEng

Doug has specialised in mineral processing and the chemical processing of minerals (hydrometallurgy). After graduating in metallurgy from the University of NSW in 1972, he worked seven years with King Island Scheelite and its sister company Warman International. This time was spent in the mineral processing and hydrometallurgy of scheelite in both plant operation and technical support. He was involved in the test work (including piloting), design, commissioning and operation of a plant producing synthetic scheelite and molybdenum sulphide byproduct. During this period, Doug obtained a M.Eng.Sc.(Chemical Engineering) from the University of Newcastle. The thesis topic was on phase separation aids in solvent extraction.
In 1979 Doug moved to the United Kingdom where he worked with Murex, eventually as head of a small process development department working on the hydrometallurgy of W, Mo, Va and Cr. His activities involved technical support to the plant and process development in all aspects of processing ranging from final stages in mineral processing to chemicals and refractory metal production.
In 1982 Doug moved to Frankfurt, Germany where he worked with Lurgi in the process development laboratory on pilot plant studies on synthetic rutile production and on testwork and technical development in the treatment of complex sulphides and gold. On returning to Australia in 1985, Doug worked for five years with Australia Wide Industries (including Topalite Resources and Centaur Mining) on the production of mullite refractory and fluoride chemicals from topaz containing silexite and on the technical development of a few gold operations. This work included the design and operation of a mineral processing and ceramics processing pilot facility and supervision of testwork and some design aspects of newly developing gold operations including the Plutonic project in W.A.
After a couple of years as a private consultant in gold and base metal processing, Doug joined the Australian Nuclear Science and Technology Organisation (ANSTO) at Lucas Heights, Sydney, in 1993 as a senior technical officer. This has involved testwork, up to pilot scale, in support of the mining industry, where mineral processing and extractive metallurgy entails treatment of ores and intermediates containing radioactivity. Bench to pilot scale studies have been carried out for example for the Mt Weld rare earthýs project, the Kintyre uranium project and in support of the currently operating Olympic Dam and Ranger Uranium mines.

  • Extractive Metallurgy
Areas of Practice:
  • Flowsheet development and plant design
  • Process – Investigation and Testwork
Commodity Experience:
  • Industrial Minerals – Clay Minerals, Refractories, Abrasives
  • Sn-W-Ta-Nb Group
  • Uranium


Photo of Mr Rodney Elvish Expert Witness
Mr Rodney Elvish Expert Witness
MetallurgistB E EnterprisesMetallurgist

Rod is a Consultant Metallurgist and Company Director who has extensive operating and consulting experience in metallurgy and mineral processing. He is Chair of the Mineral Processing Commission of the International Mineral Processing Council (IMPC).

He undertakes a wide variety of technical and commercial assignments, often combining his broad production, management, director, evaluation and development experience to achieve project specific solutions. He takes a holistic approach, matching the metallurgy to site, geological, mining and corporate factors. A similar approach is taken to evaluating new technologies.

Areas of specialisation include:

  • project management
  •  complex polymetallic metallurgy including differential flotation
  • gold, other precious and base metals recovery
  • iron ore beneficiation
  • new process evaluation
  • gravity separation
  • liquid/solid separation

Rod consults to operations staff, company boards, financiers and lawyers. He manages feasibility studies, undertakes valuations, independent reports and advises on mergers and acquisitions.

Assignments undertaken include:

  • metallurgical evaluation of exploration projects
  • managing feasibility studies
  • Assessor, Supreme Court of Queensland
  • on site plant trouble-shooting and optimisation
  • evaluation of new processes and technologies
  • independent technical reports and expert witness assignments
  • financiers’ completion tests and technical audits
  • testwork design, supervision and interpretation of results
  • flowsheet development, costing and equipment selection

Major project works include the development of major iron ore and manganese projects in West Africa, advanced tungsten processing, project management of the Browns polymetallic project (NT), the assessment and development of resin based gold and cyanide recovery technologies and new processes for recovering gold from refractory gold ores. As Director and later Chairman of Allstate Explorations NL he was extensively involved in bringing the Beaconsfield Gold Mine in Tasmania back into operation.

Rod is a past President of the Australasian Institute of Mining and Metallurgy and a Councillor of the IMPC.

  • FRMIT(PrimaryMet) 1970, DipGeoSc(MinEc) Macquarie 1984, Prof Cert in Arb Adelaide 2003
  • Mineral Processing & Metallurgy
  • New Technology Evaluation and Auditing
  • Due Diligence Studies
Areas of Practice:
  • Independent expert valuations
  • Metallurgy and mineral processing
  • New technology, research and development
  • Project – Management
  • Strategic planning including company acquisition
  • Tailings and waste management
  • Technical audit and due diligence studies
Commodity Experience:
  • Bauxite and Alumina
  • Base Metals
  • Gold, Silver
  • Iron Ore, Manganese, Chrome
  • Nickel and Cobalt
  • Sn-W-Ta-Nb Group
  • Uranium
Regional Experience:
  • Australia – Northern Territory
  • Brazil
  • PNG


Photo of Mr Tom Kendall Expert
Mr Tom Kendall Expert

Tom Kendall is a Consulting Engineer with 25 years’ experience in mining, mineral dressing and heavy industry. He has specialist expertise in materials handling, underground mine infrastructure, heap leach and CIP technology. Tom gained his initial nine years operations experience in underground mines, mineral beneficiation plants and quarries with WMC Resources and CSR Readymix, and is the holder of a WA Quarry Manager’s Certificate of Competency.
Tom has fifteen years experience as a consulting engineer in Kalgoorlie, culminating in the merger of Kendall Engineers with Sinclair Knight Merz in 1997. He left Sinclair Knight Merz in 1999 to take control of Holtfreters, a general engineering works based in Northam WA, which has been servicing WA industry for 50 years. The Holtfreters project office in Perth was established as a result of Tom’s joining Holtfreters and is undertaking engineering design and consulting work as well as smaller turnkey design and construct projects.
Tom has undertaken a wide variety of exciting projects in his career. Some involved full project design and management of mine infrastructure and treatment plants such as Bellevue and Higginsville in the WA goldfields. Others have been ground-breaking projects such as using mechanical ore sorters to separate nickel ore from gangue and the design of a high pressure pumping system to de-water the Golden Mile beneath the Kalgoorlie Super Pit in a single 700 metre vertical lift through a suspended pipe.
With most of his experience gained in close proximity to the operations of the eastern goldfields of WA, Tom has a ready appreciation of the potential impact of design philosophy on operating costs and life cycle costs.

  • BE, MEngSc, MBA
  • MMICA, CPEng
  • Process Design
  • Project Management
    Materials Handling
Areas of Practice:
  • Flowsheet development and plant design
  • Materials handling
  • Management services


Photo of Mr Graeme Miller Expert Witness
Mr Graeme Miller Expert Witness
MetallurgistSinclair Knight Merz Pty LtdMetallurgist

With over 25 years’ experience in process plant operations, design and commissioning, Graeme has participated in the development of the minerals processing industry and the application of novel techniques to many problems. He is Process Manager for one of Australiaýs largest consulting engineering companies. He has a degree in Chemical Engineering and during the early part of his career was involved in the operation of plants for treating: gold, uranium, pyrite, sulphuric acid, diamond recovery, coal preparation and coal utilisation. His design capability covers all of these fields as well as being recognised as one of the leaders in the field of copper leaching solvent extraction and electrowinning. He is the leader of a team of process engineers who have made significant contribution to the advancement of various aspects of minerals processing and hydrometallurgy.
A fellow of the AusIMM with Chartered Practicing Status, member of SAIMM and of the Coal Preparation Society, Graeme has published over 40 technical papers in coal preparation and minerals processing. SKM provides services for the study, development, execution and commissioning of mineral processing plants and mining projects. Clients have included all major Australian mining companies and a wide cross section of the industry, in a variety of commodities.

  • BE(Chem) Queensland 1974 PREng (Chem) Queensland
  • MMICA, FAusIMM (CP), MSAIMM, MCoalPrepSoc
  • Mineral Processing
  • Feasibility Studies
    Project Execution & Management
    Solvent Extraction
    Heap Leaching
Areas of Practice:
  • Coal washing
  • Flowsheet development and plant design
  • Heap Leach
Commodity Experience:
  • Bauxite and Alumina
  • Base Metals
  • Diamonds
  • Gold, Silver
  • Uranium
Regional Experience:
  • Australia – Queensland
  • Australia – Western Australia
  • Middle East (inc. Turkey, Cyprus)
  • S E Asia (Malaysia, Thailand, Vietnam, Myanmar)


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