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Investor Relations

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Management Expertise

Experienced Global Professionals & Highly Regarded Mining Executives in Brazil With a Hands-On Management Approach

Management Team

Ana Cabral

Ana Cabral

Chief Strategy Officer
  • Former Head of Equity Capital Markets Latam at Goldman Sachs in New York. Completed over $100 Billion in Transactions (+24 years)
  • MBA Columbia Business School
Ana Cabral

Calvyn Gardner

Executive Chairman
  • + 20 years at Anglo American Group
  • Former General Manager/COO of Highveld Steel and Vanadium
Alvaro Notaroberto Barbosa

Guilherme Guimaraes

Chief Financial Officer
  • Former CFO at Denham Capital Mining Companies in Brazil
  • 28 years in the mining sector
Alvaro Notaroberto Barbosa

Gregory Lear

Senior Geophysicist
  • University of Sydney specialization in pure and applied geophysics (+40 years of experience)
Ana Cabral

Itamar Resende

President of Sigma Brazil
  • Former CEO of AMG Brazil and UK (+30 years)
  • Master’s Degree in Electrometallurgy
Alvaro Notaroberto Barbosa

Max Pogorelov

Senior Geologist
  • Moscow Geological Institute with specialization in Pegmatite formations (+30 years of experience)
Alvaro Notaroberto Barbosa

Ret. Gen. Fernando Iasbech

Director of Institutional Relations
  • Held several strategic leadership roles during a distinguished 30 year career in the Brazilian army
  • IR consultant to CBMM Niobium

Board Expertise

Experienced and Multi Skilled Board of Directors: Strength of Our Corporate Governance and Transparency

Board Members

Ana Cabral

Ana Cabral

Director
  • Former Head of Equity Capital Markets Latam at Goldman Sachs in New York. Completed over $100 Billion in Transactions (+24 years)
  • MBA Columbia Business School
Ana Cabral

Calvyn Gardner

Chief Executive Officer & Director
  • Over 20 years at Anglo American Plc
  • Former General Manager/COO of Anglo’s Highveld Steel and Vanadium
Alvaro Notaroberto Barbosa

Maryse Bélanger

Non-Executive Vice Chairman
  • Chief Operating Officer at Atlantic Gold Corporation
  • Former Chief Executive Officer and Managing Director of Mirabela Nickel Ltd
Alvaro Notaroberto Barbosa

Frederico Marques

Director
  • Partner and Foreign Consultant at McCarthy Tétrault LLP in Toronto
  • Former Chairman of the Brazil-Canada Chamber of Commercee
Alvaro Notaroberto Barbosa

Gary Litwack

Director
  • Senior Partner and Counsel at McCarthy Tétrault LLP in Toronto
  • Over 30 years of securities law experience in Canada
Ana Cabral

Itamar Resende

President & Director
  • Former CEO of AMG Brazil and UK (+30 years)
  • Master’s Degree in Electrometallurgy
Marcelo Freire de Paiva

Marcelo Freire de Paiva

Director
  • Managing Partner and Co-Founder of A10 Investimentos (“A10”). Marcelo is the portfolio manager of the A10 Investimentos Fundo de Investimento de Ações – Investimento no Exterior (“A10 Fund”)
  • Sigma’s largest shareholder. Marcelo has over twenty years of experience in asset management and investment banking in New York, London and São Paulo