Mark Travers


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Mark Travers was the Executive Vice President, Vale S.A. and CEO of Base Metals up until the end of 2021. In this position Mark was responsible for Vale’s Base Metals business, headquartered in Toronto, Canada, consisting of nickel and copper operations in Canada, UK, Brazil, Indonesia and Japan. He led Vale’s efforts to transform Base Metals and helped prepare the business and its strategy for the global transition to a net zero economy.
Mark is passionate about sustainability and building a positive social, economic and environmental legacy in the communities where the businesses operated, through responsible mining practices. In his 20 years in the mining industry with Inco Limited and Vale, Mark held progressively senior roles in legal, institutional relations, communications and sustainability, including serving as General Counsel. Prior to joining Vale, Mark was a corporate and securities lawyer practicing in Toronto, Canada.
Mark holds a Bachelor of Arts (Honours) from the University of Western Ontario. As well, he holds both a Bachelor of Laws Degree from Osgoode Hall Law School and a Master of Business Administration from York University.a
Mike Oxley


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Mike is a chartered mining engineer with over 25 years’ experience in the mining industry and has extensive nickel laterite project development experience. He began his career with Billiton PLC, working on corporate planning and mine development projects. In 1999 Mike began work with European Nickel as its project manager completing concept studies for the application of heap leaching technology to the Albanian nickel laterite deposits.


Mike then led the Çaldağ Feasibility in Turkey which included the start-up of a profitable direct shipped ore mining operation and the successful completion of the Bankable Feasibility Study which help secure US$ 360 million of debt and equity investment to build the project. He then oversaw initial construction activities at the project before leading the Acoje nickel laterite heap leach project pre-Feasibility Study in the Philippines. This was completed in 2008 when he then became European Nickel’s Business Development Manager.


Following the merger of European Nickel with its joint venture partner at Acoje and the company’s decision to focus on the development of that project, Mike left to set up Alyssum Ventures to build a new company dedicated to nickel laterite heap leaching.


Mike has visited and studied over 20 of the known nickel laterite projects in the world in Indonesia, the USA, Russia, Macedonia, Kosovo, Serbia, Greece, Turkey, the Philippines, New Caledonia, Kazakhstan, and Poland. Mike has worked extensively in Latin and South America including projects in Surinam, Chile, and Mexico.
Anne Oxley


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Anne is a chartered metallurgical engineer from the Royal School of Mines, London and has over 25 years’ experience in the natural resources sector. Anne has been involved in nickel heap leach and project development work in over 40 different nickel laterite deposits in 15 countries. She is also a scientific associate of the Natural History Museum in London where she contributes industrial advice to fundamental nickel and cobalt research.


Anne began her career working at international engineering companies Technip and ABB Lummus before moving onto ENK Plc in 2003. At ENK Anne was the Group Technology Manager and was responsible for the design, construction and operation of the Çaldag˘ pilot heap leach and downstream processing facility in Turkey. Anne lead a team of international and local metallurgists and operators in the plant operation to provide all the metallurgical design criteria for the full-scale operation. Anne later set up a team in the Philippines to do the same at a newly constructed pilot heap leach facility for the Acoje feasibility study.


Following her departure from ENK in 2010 Anne co-founded Alyssum ventures to further develop and commercialise nickel laterite heap leaching technology.


Anne is a Mentor for the International Women in Resources Mentorship program launched in 2018.
Adrian Harvey


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Adrian Harvey is an experienced chief financial officer with a corporate background spanning 28 years in natural resources, energy and international power engineering projects, working in both public company and operational management in the UK, Asia, USA, Africa and India. During the last 14 years he has been involved in five admissions to AIM and LSE Premium Segment and has managed all financial aspects pre and post-IPO including equity placings, debt funding, listing and subsequent corporate and financial management. He commenced his corporate career with BTR plc as Business Controller of its Hawker Siddeley Electric Power Group, managing a portfolio of UK and international power generation projects, before moving into mine equipment engineering and clean energy businesses as chief financial officer or finance director.


In 2004 Adrian joined AIM-listed Toledo Mining Corporation plc as chief financial officer and company secretary. Adrian then joined the team which floated the Kazak oil and gas E&P business, Max Petroleum plc on AIM, spending five years with Max as group financial controller and company secretary.


Adrian is a Fellow of the Chartered Association of Certified Accountants.
Omar Caceres



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Omar is a Metallurgical Engineer from the “Universidad Industrial de Santander” (Industrial University of Santander) in Colombia with over 20 years of experience in the mining industry. Omar started his career working for BHP Billiton in Colombia, where he stayed for 14 years working on process engineering, information management systems, business improvement (six sigma projects), business and production planning, corporate reporting, cost controlling, and business and investment valuation.


During his last five years at BHP Billiton, he played a leadership role in the escalation of heap leach concepts as applied to nickel laterite ores. In 2011, Omar joined Rio Tinto in its copper project division in the US, where he was responsible for the industrial scale demonstration of the heap leaching of chalcopyrite dominant copper ores. In 2015, Omar joined Brazilian Nickel as Project Manager and led the team to re-design, refurbish. commission and operate the Piaui Nickel Project demonstration plant.
Guilherme Jácome



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Guilherme is a registered engineer with 20 years’ experience in the mining and infrastructure industry. While a Director at Potássio do Brasil, he was in charge of the development of the Autazes Potash Project in the Amazon, Guilherme went on to become President and was responsible for marketing development, public affairs, licencing and ESG standards. Prior to this, he was a General Manager at Vale, implementing the development of a new management and performance system and supporting an estimated investment plan of US$50 billion. His earlier work at Vale included construction management and business development of the 118 Copper Project, Cristalino Copper Project, Niquel do Vermelho and Salobo Copper Project, mainly in the Amazon region. Additionally, within Guilherme’s career he began the construction of the Onça Puma Nickel Project, where he was responsible to plan and control the overall enterprise, including managing multiple contractors with an investment of US$2.3 billion and 9,000 workers
Ailton Miranda



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Ailton is a qualified Certified Professional Accountant and holds an MBA in Financial Control from Sao Paulo. Ailton is Brazilian, and fluent in English. He joined Piauí Niquel Metais (“PNM”) in June 2014 and has held the position of Financial Manager and acting Company Secretary and has been responsible for all aspects of financial control and accounting for the Piaui project. He has gained international business exposure on Foreign Trade and Commercial Missions to China and Europe. His professional career includes working in 2013 on the turn around at Carpathian Gold’s Mineradora Riacho dos Machados project, where he was involved in cash and working capital management and sovereign debt negotiation, and a further fifteen years in other Brazilian industrial,mining and commercial sectors working in corporate finance, cost and tax restructuring, planning and implementation.
Marcelo Rideg



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Marcelo is a Brazilian biologist with an MBA in Project Management (PMBOK) with over 15 years of experience in Environmental & Social studies and permitting in Brazil.


He began his career performing flora surveys and forest inventories throughout Brazil, and South America. In 2010 Marcelo joined Arcadis SA, a global consulting company, to coordinate the development of technical studies (such as Environmental and Social Impact Assessments) to support the environmental permitting of projects. By 2013 he was the Project Manager & Technical Reviewer for the permitting of several projects in various sectors such as Energy, Industry, Agriculture, and later focusing on Mining (for companies such as Vale, Anglo American and Samarco). In August 2016 Marcelo joined Piauí Níquel Metais as Environmental and Institutional Relations Manager.
Rogério Dias



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Rogério has a degree in Mechanical Engineering.


With 30 years of experience in management, operation and maintenance of industrial plants, automation, people management and greenfield projects, working in several locations distributed in three continents.


His career was developed in companies such as Votorantim, VALE and Holcim.


In August 2021, Rogério joined Piauí Níquel Metais (PNM) as Production Manager.
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Carlos Fonseca


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Carlos is a chartered metallurgical engineer from the “Escola de Minas – Universidade Federal de Ouro Preto” (Federal University of Ouro Preto) in Brazil.
He started his career working for Piauí Níquel in 2016 as a process engineer and was part of the team that refurbished, commissioned, and operated the Demonstration Plant. He then led the initial construction of the PNP 1000 in 2021 and was Project Coordinator within the full team that completed this. He has developed skills in process engineering for nickel laterite heap leaching, as well as project coordination and process management. He is currently the Engineering Manager for the PNP 1000.
Cecília Souza


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Cecília holds a degree in Psychology from the Federal University of Uberlândia and a postgraduate degree in Business Administration and Business Pedagogy.


She has 18 years of experience in the human resource area in both the tourism and mining segments. Cecília has worked with VALE and BAMIN, where she had the opportunity to develop activities in mining companies in phases of operation and green field projects.


In January  2021, Cecília  joined Piauí Níquel Metais (PNM) to lead the Human Resources department.
Benito Gioppo


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Benito has more than 25 years of experience in the areas of Administration, Infrastructure, Supplies, Contract Management and Operations with expertise in managing high performance teams, KPI’s and SLA’s management, budget and forecast, account control, preparation of WBS, administrative and operations management, full service facilities. Management of industrial relations, coordination of shared services (SSC), ISO 14001 certifications, among others.
Master’s student in Professional Administration, he also holds an Executive MBA in Marketing and a Bachelor of Business Administration, having worked in large, medium-sized multinational companies and family businesses, such as Vale, Anglo American, Elasa (Elo), Jones Lang LaSalle and GPA, among others, always in leadership positions.

Developing low cost nickel and cobalt production in Brazil