Geopyörä is a start-up company on a mission to bring mining into a new era of big data. Our state-of-the-art rock breakage characterization technology allows mining companies to rapidly test several samples at low cost and generate a large amount of high quality data, which can be used to better assess the ore hardness variability, reduce risks and add value to projects.

Our Values


One mine, one solution.

Always challenge the status quo,

To deliver solutions we believe in.

We are together in this journey!

The Team

Members of the founding team have a diverse background, with strong academic and professional experience both in mining and financial markets. With track history in project and business development, the team is prepared to make a positive difference in the industry.


Marcos de Paiva Bueno, Ph.D.

CEO & Founder

With more than 15 years of work and research experience in the fields of mining and mineral processing engineering, Dr. Bueno has an in-depth knowledge on the design and optimisation of comminution circuits as well as geometallurgy. He completed a PhD degree at the University of Queensland, specialising in multi-component autogenous and semi-autogenous grinding. He has carried out extensive comminution circuit surveys as well as pilot plant campaigns both in Australia and internationally. Working as a senior process engineer for Ausenco, he has been involved in technical and engineering studies related to most key mining commodities. More recently, as a senior researcher and lecturer at the University of Oulu, he developed the Geopyora breakage test with financial support from Business Finland.


Rajiv Chandramohan, Ph.D.

CTO & Co-Founder

Rajiv has more than 17 years’ experience in operations, mineral processing research, comminution, materials handling, metallurgical testing and numerical and process simulations.  He has developed a wide range of novel technologies and optimisation methods applicable to the mining industry. He is an industry leader in operations optimisation and has consulted on several global projects and operating mine sites ranging from design to optimisation. At Ausenco, Rajiv leads the Global Operations Optimisation group; providing an integrated optimisation approach driving value in underperforming operations. 


Ronan Cruz

CFO & Co-Founder

Ronan Cruz is an economist, master accountant and serial entrepreneur. With solid background in financial markets, worked for institutions such as Deutsche Bank, Wachovia Securities and BTG Pactual. Has participated in M&A deals with global companies and acted as business consultant before started investing and developing a series of business and startups. 

The Advisory Group


The advisory group has been formed to cover all key aspects of the route to market, including both academics and representatives of the mining and metallurgical laboratory testing industry.


Prof. Malcolm Powell

Professor for Sustainable Comminution JKMRC

Sustainable Minerals Institute University of Queensland. Malcolm worked at Mintek then established the comminution research and consulting groups at the University of Cape Town. He held the Professorial chair in sustainable comminution at the JKMRC of the University of Queensland for 10 years. He aims to link fundamental research into applied outputs through the development of mechanistically correct but practical and robust process models. Malcolm has conducted applied surveying and site optimisation studies on over 60 plants worldwide. His interests cover liner design, SAG mill modelling and control, the unified comminution model (UCM), ore characterisation for multi-component modelling, and flexible circuits – to utilise today’s equipment while enabling the uptake of tomorrows technology. These are published in over 150 articles.


Prof. Holger Lieberwirth

Director at the Institute of Mineral Processing Machines, Technische Universität Bergakademie Freiberg

Holger does research in crushing and comminution machines, including electric impulse comminution, screening and air separation technologies, palletisation, LCA and recycling technologies. He has expertise in leading and motivating multinational teams in international projects; developing solutions in countries as different as China, Saudi Arabia and Canada; managing key accounts as VALE, Freeport Indonesia, SUEK, Krutrade or Gujarat Ambuja Cement; manage engineering, workshop and sites.


Dr Simon Michaux

Associate Professor at Geological Survey of Finland (GTK) / Geologian tutkimuskeskus (GTK)

Simon has a Bach App Sc in Physics and Geology and a PhD in mining engineering. He has worked in the mining industry for 18 years in various capacities. He has worked in industry funded mining research, coal exploration and in the commercial sector in an engineering company as a consultant. Areas of technical interest have been: Geometallurgy; mineral processing in comminution, flotation and leaching; blasting; mining geology; geophysics; feasibility studies; mining investment; and industrial sustainability.

3___Geopyora_About_Us_Jussi Liipo.jpg

Dr. Jussi Liipo

Experienced Chief Mineralogist at Outotec

With a demonstrated history of working with geometallurgy in the mining & metals industry. Strong professional with a Ph.D. focused in Geology and Mineralogy from University of Oulu, Finland.


Ville Anttila

General manager

General manager at CRS Laboratories Ltd Oy which is a service provider for mining and exploration industry in Scandinavia. Ville has extensive experience in Mining and Mineral exploration with international mining companies.