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Developing the next major nickel project in Brazil

Please note that the Company was placed into Administration on 16 May 2024 and Chad Griffin and Geoff Rowley of FRP Advisory were appointed as Joint Administrators.

The Joint Administrators will be winding-down the Company’s operations following which it will cease trading.

Should you have any queries regarding the administration, you can contact the Joint Administrators on

The Joint Administrators act as agents of the Company and without personal liability.

The Company entered Administration on 16 May 2024. The affairs, business and property of the Company are being managed by the appointed Joint Administrators Chad Griffin and Geoffrey Paul Rowley.

Senior Management

Our management team have extensive experience in the exploration and mining sector, demonstrating strength and diversity.


Philipa Varris
Head of SustainabilityMSc (Nat Resources), MAusIMM CP (Env), CDI.D.
Philipa Varris has held leadership positions in environment, health, safety and community management in the mining sector for over 25 years, primarily in Africa and Australasia and across a number of mineral commodities. Philipa has been awarded the Australian Centenary Medal for leadership in Australia’s largest community consultation and strategic vision development initiative and was recognized in 2020 as one of the WIM UK 100 Global Inspirational Women in Mining. As a champion for mining ESG leadership, Philipa has led teams recognised with the Prospectors and Developers Association of Canada Award for Environment and Social Responsibility, the AMEEF Award for Environmental Excellence, and the Mines and Money ESG Producer of the Year Award, amongst others. Philipa is a Non-Executive Director of EnviroGold Global and is a member of the UK Committee of the Australian Institute of Mining and Metallurgy (AusIMM).

Leo Neves
General CounselLL.B., LL.M. (Corporate & Securities).
Leo Neves has over 20 years of experience having developed his legal career at law firms Pinheiro Neto Advogados (Brazil), McMillan LLP (Canada) and Fasken Martineau LLP (UK). He has also acted inhouse for various mining companies, including Ferrous Resources where he spent 9 years as Head of Legal and Company Secretary until its acquisition by Vale S.A. in 2019. Prior to joining Horizonte, Mr Neves acted as a senior legal consultant for global law firm Linklaters LLP (Re:link, London). Mr Neves holds an LL.B. degree from University of Brasília (UnB) and an LL.M. degree from the London School of Economics and Political Science (LSE). He is qualified to practice as a solicitor in England and Wales, as well as in Brazil and Portugal (advogado).


Graham Crew
Interim COO.
Mr Crew was Chief Technical Officer of La Mancha Resource Capital LLP (“La Mancha”), which advises La Mancha Resource Fund SCSp, one of the Company’s major shareholders. Mr Crew has been on a period of secondment to the Company in recent months having stepped down from his day-to-day executive role within La Mancha. He was previously a Non-executive Director at Golden Star Resources Limited before becoming Chief Operating Officer. He has extensive operational experience in Australia, Africa and Asia and was previously Operations Manager for La Mancha Resources Australia, including the development and construction and ramp up of the Mungari processing facility, prior to the divestment of those assets to Evolution Mining. He began his career with Western Mining Corporation at Olympic Dam and Leinster Nickel Operations. He holds a B.Eng (Mining Engineering) from the West Australian School of Mines, is a Member of the Australian institute of Corporate Directors and a Fellow of the Australasian Institute of Mining & Metallurgy.

Leo Vianna
Araguaia Project Director.
Mr. Vianna is a Mechanical & Mechatronic Engineer with over 24 years experience in project implementation & management. He was previously Project Director for Vale’s B$1.9B Bahodopi nickel project (REKEF processing plant) in Asia. He has significant experience in Project Management (FEL methodology and PMI), Engineering, Construction, Maintenance and Health & Safety and has worked in Brazil, Mozambique, South Africa, Guinea, United Arab Emirates. Mr. Vianna holds a bachelor's degree in mechatronics engineering from CEFET – Rio de Janeiro and an MBA in corporate finance from PUC – Rio de Janeiro.