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About Geopyörä

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.


Prof. Malcolm Powell


Malcolm has applied fundamental comminution research to design and process improvement on over 70 mines worldwide during 35 years at Mintek, UCT, and then as Professor of comminution at the JKMRC in Australia. His work is published in over 200 papers and has been presented in as many conferences worldwide. Malcolm collaborates extensively, with close compatriots on 5 continents forming the Global Comminution Collaborative (GCC) – providing an expert research and consulting base covering the full comminution process chain. Malcolm provides on-site experiential training and site reviews to empower mine staff to upgrade the productivity and their skills. This is supplemented with formal training workshops on liner design, comminution and Advanced Mine to Mill. Malcolm’s research vision is of integrated total process simulation as a tool for innovation – linking geology, mining, energy and size reduction, gangue rejection and recovery into flexible process design and process optimisation.


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. 


Thiago de Almeida

Trainee Engineer

With background in Nuclear Engineering at the Federal University of Rio de Janeiro, de Almeida has experience in full-stack software development projects, data science, artificial intelligence, nuclear technology and comminution, in addition to being a finalist of the 2019 World Nuclear Olympiad in Vienna, having presented his final project during a conference at the UN office. Currently working on a research project based on the application of machine learning algorithms to predict Geopyörä's comminution parameters using data from nuclear instrumentation tests, such as X-ray diffraction (XRD), X-ray fluorescence (XRF) and Inductively coupled plasma atomic emission spectroscopy (ICP-AES), unravelling the intricate relationships among material properties, chemical and mineralogical composition, and their collective influence on hardness.

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Leonardo Lara

Trainee Engineer

Leonardo is a Mining Engineering student at the University of São Paulo with courses of project management in FGV-SP and a technical background in electronics, currently conducing researches in rock mechanics and comminution test impact on mining projects. 


Constanza marino

Trainee Engineer

Constanza Maria Mariano is graduating in Mechatronics Engineering at PoliUSP. With a strong background in CAD and CAM, she has honed her skills in design and manufacturing. Constanza has applied her coding expertise to various projects and is proficient in programming languages such as Python, C, and C++. Her dedication to academic excellence and passion for technology earned her a full scholarship to the prestigious Weizmann Institute's summer school in Rehovot, Israel, where she delved into the realm of atomic physics. Constanza's ultimate aspiration is to lead and innovate in the field of mechatronic systems, driving her to dream big and make her mark in the world of technology. 

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