Gekko Systems is a company dedicated to driving change in the global minerals processing industry.

We have established a recognised leadership for developing cost-effective and beneficial equipment for a range of mineral sectors, including gold, diamonds, tin and tantalum.

The people at Gekko have a passion for innovation and this is at the heart of Gekko's team approach to development. Working closely with our clients and solving their problems often leads to exciting new developments.

We recognise that achieving excellence is all about having the right information and the right processes, but mostly it’s about having the right people.
We recognise that achieving excellence is all about having the right information and the right processes, but mostly it’s about having the right people.


World’s best value and outcomes for customers at all process design and implementation stages.


Make a difference to customers and community through world leadership in mineral processing and effective solutions delivery.


  • Community
  • Open
  • Networked
  • Excellence
  • Continuous Innovation
  • Teams

Elizabeth Lewis-Gray
Managing Director

Elizabeth Lewis-Gray is co-founder and Chairman of Gekko Systems, based in Ballarat, Victoria.  Gekko is a world leader in gold and silver processing technology, and energy (processing) efficient modular plants, designing, construction and operation.  The company was established in 1996 and in addition to its head office in Ballarat, has offices in Perth, Vancouver, and Johannesburg.

Internationally, the company has specialised for over 20 years in the sale of capital equipment. Elizabeth lead the charge on strategic amalgamation and acquisition of large projects from a sales process, as well as target marketing and also a strong oversite of the major sales projects and key strategies, such as multi-tier selling and key account management.  Through the business, she understood organised and directed many major selling projects in addition to having opened offices in Johannesburg, Vancouver, Santiago, Perth and Moscow, as well as establishing an agency and associates network.

Elizabeth is the founding Chair of the Federal Government’s Mining Equipment, Technology and Services (METS) Growth Centre and has recently stepped down as Chair of Austmine, the peak industry body in Australia for the mining equipment, technology and services (METS) sector, a $90 billion industry. Previously, she was a member of the Australian Federal Government’s National Precincts Board and the Innovation Australia Board.

Founder and now Patron of CEEC (Coalition for Eco-Efficient Comminution), Elizabeth was visionary in the formation of this not-for-profit organisation which aims to accelerate knowledge and change transfer in the field of eco-efficient comminution. CEEC has the capacity to have a meaningful global impact on energy consumption in mining and has recently been awarded the 2013 Mining Magazine Editor’s award.  In August 2014, Elizabeth was named by the Canadian CIM Magazine as one of the top 12 influential people to know in the mining industry in relation to her work at CEEC.

Elizabeth was inducted into the Australian Businesswoman’s Hall of Fame in 2000, is a Fellow of the Financial Services Institute of Australasia (FINSIA), and has won several awards including the Warren Centre’s Innovation Heroes Award. In 2015, Elizabeth was nominated and listed in the Australian Financial Review’s “100 Women of Influence Award”.

As well as her involvement in the mining sector, Elizabeth is also Patron of the Biennale of Australian Art (BOAA).  Before entering the mining industry Elizabeth worked in stockbroking and strategic planning. Her qualifications include a Bachelor Degree in Economics, and a Masters in Business Management.  In 2016, Federation University Australia honoured Elizabeth with a Doctor of the University Honoris Causa degree in recognition of service and contributions to the mining sector, mineral processing, business leadership, and environmental management.

Sandy Gray, Technical Director

Sandy Gray
Technical Director

Sandy Gray is co-founder and Technical Director of Gekko Systems, and is responsible for the Technical, Sales, and Research and Development teams. He has a background in mine management and over 35 years’ experience in mining and mineral processing operations, having invented his first jig at 17 years of age in the Curnamona Basin in South Australia.

A world leader in gravity gold and leaching flowsheets design, pre-concentration, polymetallics, materials handling and effective plant design, Sandy invented Gekko’s patented systems including the InLine Pressure Jig (IPJ), InLine Leach Reactor (ILR), G-Rex Resin Exchange and the Python Processing Plant.  His inventions are breakthroughs in the field of mineral processing with over 600 installations at mines in 43 different countries over the last twenty years.

Sandy is a recipient of the prestigious Clunies Ross Award, Australia’s pre-eminent award for scientists, technologists and innovators. Other awards he has received include the AusIMM Mineral Operating Technique Award, the Ernst & Young Entrepreneur of the Year Award (Technology, Communications, E-commerce & Life Sciences – Southern Region), the Victorian Premier’s Design Award in 2010 for the Python low height modular plant and received the Professional Excellence Award 2017 The AusIMM

In recent years Sandy’s main focus has been on improving plant economics incorporating technologies/flowsheets which focus on overall plant productivity improvements in energy, reagents, and maintenance/operations. He believes that to maximise the benefits of the new flowsheets it is necessary to have a completely integrated approach and possibly the most exciting transformation will come through the total downstream benefits of fine crushing up front for optimum liberation ahead of any further process.

Sandy’s career includes the introduction of intensive cyanidation for the recovery of gravity gold concentrates into the gold industry through the development of the InLine Leach Reactor. This technology is now used throughout the world in most gold mines with gravity circuits. Another achievement is the application of VSI (vertical shaft impact) technology to improve pre-concentration outcomes through a focus on liberation characteristics. This was used originally as a stop-gap for HPGR, but Sandy believes it will become a standard metallurgical tool for those trying to optimise liberation.

Sandy is currently completing research and development into coarse liberation, resin thiosulphate and other environmental processing opportunities to further advance Gekko’s capabilities.

Gekko Management Committee

Gekko Management Committee

Gekko’s expert management teams deliver world technical leadership in areas such as gold and mineral processing, low energy flowsheets and continuous gravity solutions.

With a global reputation to provide innovation that works, Gekko management teams oversee the supply of vertically integrated solutions to customers - from ore analysis, engineering and manufacturing, through to full operations management and support.

This is achieved by offering customers access to unique proprietary technologies, design and construct capabilities and on-site operational service packages.

Gekko management teams allow the company to offer a low-cost, ‘one-stop shop’ service and supply model.

To Top