About us

Recognized in 2025 as one of few Brazilian women in Forbes’ 50 over 50 global trailblazers list, Ana is CEO at Sigma Lithium and co-chairs the Company’s inception in 2012.

Sigma Lithium is the fifth largest industrial-mineral lithium complex globally, producing carbon-neutral lithium concentrate. She is one of the pioneer investors and longest-serving CEOs in the lithium industry.

Ana co-founded A10 Invest, a leading venture capital boutique focused on impact investing. A10 FIA is the largest shareholder of Sigma Lithium, backing it to produce the Quintuple Zero Green Lithium, which is Carbon neutral and environmentally and socially sustainable.

Ana was awarded “Mining Person of the Year” in 2023 by Canada’s Northern Miner and “Industrial Person of the Year” in 2024 by the Minas Gerais Industry Federation. The State of Minas Gerais has awarded her the “Tiradentes Medal of Honor” for contributing to its economic development.

She has over 30 years of experience as a venture capital investor and sênior banker at global investment banks in New York, London, and São Paulo. She was Head of Latin American Capital Markets and a Managing Director at Goldman Sachs in New York. During her career, she has been involved in more than 150 capital markets and M&A transactions totaling more than $120 billion. Five of the transactions she worked on received the prestigious IFR “Deal of the Year” award, including the privatization of Vale in 1996.

Ana is on the Global Advisory Board of Columbia University Global Centers in New York. She co-founded “Mulheres do Brasil,” the country’s leading civil movement, with over 120,000 women as active members.

Bruno joined the Company as General Counsel in August 2024. With over 20 years of experience in corporate law, he has held Head of Legal and General Counsel roles at companies across the mining, steel, and energy and gas industries. His academic background includes a Law Degree and postgraduate studies in Tax and M&A from Pontifícia Universidade Católica de São Paulo (PUC), and an MBA from the Universidade de São Paulo.

With over two decades of experience in investment banking and consulting, Daniel has built a distinguished career advising on corporate finance, strategy, and business transformation. Most recently, he served as a Senior Advisor in the Turnaround & Transformation and Corporate Finance & Strategy practice areas at Boston Consulting Group.

Previously, Daniel was Head of Investments at RK Partners and an Investment Officer at Angra Infra, where he was responsible for overseeing key investment initiatives. His earlier career includes investment banking roles at Goldman Sachs in São Paulo and J.P. Morgan in London, where he gained extensive expertise in financial structuring and strategic advisory.

Daniel holds an MBA from The Wharton School of the University of Pennsylvania and a Bachelor of Science in Electrical Engineering from Tufts University.

Ligia has over 20 years of experience as a Senior Consultant, Professor and Researcher at Fundação Getulio Vargas on Human Rights and Business, Corporate Strategic Planning and Corporate Governance practices in accordance with ESG performance standards.

She holds a PhD in Business Law and Corporate Governance from University of São Paulo, having done research exchange at La Sapienza-Roma and IE Business School in Madrid. In those areas, Ligia is also experienced on working in large law firms.

Forerunner – in Brazil – of the creation of metrics and diagnostic evaluation surveys for the implementation of corporate policies focused on human rights, ethical standards of performance, innovation and diverse collective intelligence.

She has experience in institutional relations and public policy through dialogue with various stakeholders, formulating interaction channels, including the various instances of Public Authority.

Ligia is a member of several boards, including FIESP, Conselho de Líderes da CNI, Energy Transition Committee of CDESS, Global Compact UN, Women’s Entrepreneurship Committee (Ministry of Economy), Ambassador of Zumbi dos Palmares College and at Grupo Mulheres do Brazil.

In that last institution, which engages more than 120,000 women, she is Director of Institutional and Government Relations since its conception.

Keith Prentice is a seasoned leader in mine development and construction, with significant experience in Africa and internationally. Keith was formerly the Director of Processing at Sigma Lithium, where he most recently co-led the operational ramp-up of the Greentech Plant. Prior to joining Sigma Lithium, Keith served in leadership roles at Sierra Rutile Limited and Okavango Mining Engineering, where he developed and implemented major capital projects, managed project risk and mitigation, and worked alongside executive management on forecasting and reporting. Keith’s experience also includes roles as General Manager of Business Development at ELB/PBA Engineering and Departmental Head of Process at Kenmare Resources Plc. Earlier in his career, Keith spearheaded mining projects across Africa, and held various managerial positions at De Beers. Keith holds a degree in Extraction Metallurgy from the School of Mines at the University of Johannesburg and a Production Management Diploma from Technikon RSA.

Reinaldo Brandão is a senior mining executive with over 30 years of industry experience in complex mine systems operation from pit to port in global companies of mining and metallurgy. He holds a degree in Filtration Dry Stacking of Iron Ore Tailings from USP – Escola Politécnica da Universidade de São Paulo. Reinaldo has extensive experience in greenfield projects involving R&D and implementation, as well as operations with a focus on sustainability and ESG. Prior to joining Sigma Lithium, Reinaldo was a senior mining and metallurgy consultant at Norsk Hydro, as well as COO of Iron Ore at Anglo American Brazil, and COO and Mining Managing Director (CEO) of Vallourec & Sumitomo Brazil. Reinaldo began his career in mining leadership at Vale, where he held roles including Mining Automation Manager, Mine Operations Coordinator, and various engineering positions.

Reinaldo has a PhD in mine planning from Universidade Federal de Ouro Preto and He also received an MS in Engineering and a Bachelors in Mining Engineering from Escola De Minas.

Iran Zan is a geologist with over 12 years of professional experience in mining. Throughout his career, his work has included exploration and operational geology as well as administrative management in the pre-construction, implementation, and pre-operation phases of lithium and heavy minerals mines. Iran has held senior positions as Director of Community Relations and Institutions and Senior Exploration Geologist at Sigma Lithium over the past seven years. Previously, Iran was a Full Exploration Geologist at Mineração Taboca S.A. and Yamana Gold Inc. Iran holds a bachelor’s degree in Geology and Geosciences from the Universidade Estadual de Campina

Alexandre Matos is the Director of Health, Safety, Environment, and Community Relations at Sigma Lithium. He holds a degree in Environmental Engineering from the Universidade Federal de Itajubá (UNIFEI), an MBA in Business Administration from Fundação Getúlio Vargas (FGV-SP), a Master’s degree in Territorial Planning and Environmental Management from the University of Barcelona, and a postgraduate certificate in Occupational Safety from Pontifícia Universidade Católica de Minas Gerais (PUC Minas). He has over 18 years of experience in the mining and engineering sectors, including leadership roles at multinational companies. Throughout his career, he has led sustainability strategies, health and safety programs, environmental licensing processes, risk management, and community engagement initiatives.

Fádwa Andrade holds a degree in Social Communication, a postgraduate degree in Business Management from the Pontifícia Universidade Católica of Minas Gerais and an Master Business Administration from the renowned Fundação Getúlio Vargas, in addition to being a specialist in the global agenda of Human Rights. With more than 20 years of experience in the mining sector, she has worked as a Senior Executive of Sustainability, Communications and Human Rights at companies such as Vale, Kinross Gold Corporation, AngloGold Ashanti and Norsk Hydro.