Key Management

Executive Committee

BRYCE CROCKER - Chief Executive Officer / Executive Director

Bryce Crocker is a seasoned mining and natural resources executive with significant experience in base metals including cobalt. Mr Crocker joined Xstrata plc shortly after its IPO in mid 2002, was based in London in business development roles until 2006, upon when he transitioned to Canada following the acquisition of Falconbridge and establishment of Xstrata Nickel headquarters in Toronto. His past nickel/cobalt roles at Xstrata plc’s nickel division include VP and Head Strategy, Marketing and Research, and GM and Head Business Development. Mr Crocker was a Director on the Xstrata Nickel Board, an Xstrata nominee Director to the Nickel Institute Board (global body representing the industry) and an Xstrata nominee to the Kabanga Shareholder Advisory Committee.

Following the sale of Xstrata to Glencore in 2013, Mr Crocker was based in Latin America focused on natural resource investments in the region. Mr Crocker holds an LLB (Honours) and BSc from the University of Melbourne and a Post Graduate Diploma in Applied Finance and Investment from the Australian Securities Institute.

JAMES MAY - Chief Financial Officer / Executive General Manager - Finance

Mr May joins Jervois with more than 20 years of experience in the global resources industry. He began his career with Deloitte in London within its energy and resources division, before joining Rio Tinto in 2006.

At Rio Tinto, Mr May spent time in a variety of global positions of increasing seniority, culminating in the role of Interim Vice President – Sales and Marketing, for the Energy and Minerals sales portfolio, based in Singapore. The role is responsible for commodity sales generating more than US$2 billion of revenue annually. Mr May was also responsible for new business initiatives and marketing projects for the portfolio, including the evaluation of commercial opportunities in lithium and other battery metals.

Prior to moving to Singapore in 2018, Mr May spent four years in Darwin as Chief Financial Officer of Energy Resources of Australia Limited, an ASX-listed uranium miner majority owned by Rio Tinto. In this role he was responsible for leadership of all finance, commercial, business development and governance activities.

Mr May also spent time in corporate roles with Rio Tinto as part of the group business development team focused on corporate strategy, M&A and related projects, and in roles with group finance.

GREG YOUNG - Executive General Manager - Commercial

Mr Young is one of the world’s foremost traders of nickel and cobalt products, with extensive knowledge of the commodities, their materials flow, market indices and pricing strategies.

Mr Young gained this experience during his 25-year tenure in Glencore’s United States business, which culminated in his appointment as Co-Head of Glencore USA, a position he held for over 10 years. Mr Young ran Glencore’s Stamford office in Connecticut, which housed approximately 50 metals traders and other employees.

Over the course of his career with Glencore, Mr Young managed more than 20 commodities including all North American marketing for Glencore’s alloy division. Glencore’s alloy division during his tenure encompassed, amongst other products, nickel, cobalt and ferrochrome. Mr Young started Glencore’s cobalt trading book, which during his tenure became the worlds’ largest. Mr Young oversaw United States marketing and placement of all nickel and cobalt products resulting from Xstrata plc’s US$17 billion acquisition of Falconbridge, a Canadian base metal producer, in 2006. Mr Young also handled all North American sales resulting from Glencore’s acquisitions of the Mopani copper-cobalt mine and processing plant in Zambia and the Murrin Murrin nickel-cobalt facility in Australia.

During Mr Young’s tenure, Glencore’s United States metals business achieved compounded annual sales growth of almost 35 percent. Mr Young left Glencore shortly after its IPO, having established a 30 percent market share or greater in the majority of the commodities traded.

SAMI KALLIOINEN - President and Managing Director - Jervois Finland

Mr Kallioinen is the President and Managing Director of Jervois Finland. Sami has worked for the company since 1998. He started as Accounting Manager and in 2010 took the role of Controller. From 2008 to 2010 Sami was on assignment in USA, Cleveland. Sami has a Master’s Degree of Science in Economics and Business Administration.

CARLOS BRAGA - President and EGM - Jervois Brasil

Mr. Braga joined Jervois from Brazilian private fertilizer group, Morro Verde Fertilizer, where he was Chief Executive Officer since 2021 and successfully transitioned the company into operation, selling phosrock into the Brazilian domestic market. Prior to Morro Verde Fertilizer, Mr. Braga spent three years at McKinsey in São Paulo where he advised clients on operational transformation and optimization across a range of industries including fertilizers, rare earths and base metals.

Earlier roles include Chief Operating Officer and Country Manager for Meridian Mining, a manganese operation in Brazil owned by the private equity firm Sentinent Group, from 2015 to 2018; Vice President Operations for MbAC Fertilizer from 2009 to 2014, where he led the US$350 million construction and start-up of the Itafos Arraias fertilizer project in Tocantins state. The Itafos Arraias project construction had a 2,500 labour force at its peak; Mr. Braga also coordinated lender due diligence for the US$114 million project finance facility with International Finance Corporation (“IFC”), BNDES, Itaú and WestLB. He was also a Senior Associate at AT Kearney in São Paulo from 2007 to 2009. From 2003 to 2007 he spent four years as Strategic Planning Manager of the Zinc Division at Votorantim Metais, part of the Votorantim Group.

Mr. Braga has previous experience with Jervois’ SMP refinery, when early in his career in 2001, he collaborated in the implementation of a US$20 million expansion through his role at the engineering firm Progen.

Mr. Braga is a graduate of São Paulo University with an MBA from Cornell University in the United States.

MATTHEW LENGERICH - Executive General Manager - Mining

Mr Lengerich joined Jervois from global miner Rio Tinto, where he has spent more than 20 years in a range of roles, with his last position as General Manager – Digital Transformation, based in Salt Lake City, Utah. Over the past four years, Mr Lengerich has been a key leader of Rio Tinto’s efforts to advance its capacity in artificial intelligence, data analytics and mine productivity across its global operating sites.

Prior to these specialised mining technology roles, as General Manager of Rio Tinto Iron Ore’s integrated operations centre in Perth, Australia, Mr Lengerich had responsibility for 450 staff in central control, executing dynamic scheduling and maintaining the production systems associated with the delivery of 320Mtpa of iron ore from Western Australia. This product was sourced from 15 mines, and transported through 1,700km of rail network and four independent ports, by the remote operating team.

Corporate Management

MICHAEL RODRIGUEZ - Group Manager – Technical Services

Michael Rodriguez has over 30 years of experience in the design, construction, commissioning, operation and management of hydrometallurgical and pyro-metallurgical plants across Australia, Turkey, Europe and the Americas.  Michael has a strong background in project construction, mechanical completion and site handover to operations. His previous employers include Poseidon Nickel (Windarra, Black Swan and Lake Johnston Nickel Operations), GoldCorp, WMC Resources (Olympic Dam and Kwinana Nickel Refinery), Glencore (Murrin Murrin) and Gordes Nickel.

He has held senior executive roles as Chief Operations Officer, Refinery Manager, Projects, Technical Services and Corporate Strategic Development Manager. As site registered manager he managed over 300 staff and contractors with an annual budget over A$150 million. His team had responsibility for the design and commissioning of the High Pressure Acid Leach (HPAL) circuit, including the Pressure Oxidative (POX) leach autoclave, sulphuric acid and hydrogen sulphide plants, solvent extraction (SX) and hydrogen reduction.

Mr Rodriguez was a Non-Executive Director of Jervois from October 2017 prior to his appointment as Executive General Manager – Technical Services in 2019.

WAYDE YEOMAN - Group Manager - Commercial

Mr Yeoman joins Jervois with more than 30 years of experience in the global cobalt industry. He began his career with The Shepherd Chemical Company (“Shepherd”), a manufacturer of metal-based chemicals, including many cobalt products. Shepherd remains one of the largest consumers of cobalt in the United States. At Shepherd, he progressed through various positions in production, purchasing and sales.

Over the course of his career, Mr Yeoman also worked for global cobalt merchants Metal Resources Group and Darton Commodities, where he had responsibility for sales of cobalt metal to major consumers in the United States.

Mr Yeoman also spent 14 years in multiple roles at OM Group, Inc (“OMG”). OMG was the world’s largest cobalt refiner at the time, with more than 10,000 metric tonnes of refined cobalt output annually from the Kokkola facility in Finland. Kokkola’s production included cobalt metal powder, cobalt fine powders, cobalt oxide and other salts for use in the battery, hard metal, catalyst and other industries.

As Director of Cobalt Sourcing and Marketing at OMG, Mr Yeoman was active across the global cobalt supply chain. He was responsible for purchasing cobalt feedstocks for the Kokkola cobalt refinery, as well as cobalt metal raw materials for OMG’s carboxylate production facilities. As a member of OMG’s Cobalt Management executive team, he was involved with strategic decisions regarding refining volumes, product mix and pricing strategies.

KLAUS WOLLHAF - Group Manager - Commercial

Mr Wollhaf joins Jervois with more than 30 years of experience in the global mining industry. He began his career with Anglo American Platinum Limited (“AngloPlats”), one of the world’s largest producers of platinum group metals (PGM’s) as a Minerals Process Engineer at Anglo’s PGM smelting and base metal refining facilities in South Africa.

Over the course of his career, Mr Wollhaf also worked in senior operational roles across multiple commodities including managing ferrochrome smelting operations for Anglovaal Minerals and Assmang in South Africa, and smelting and refining operations of copper and zinc for Falconbridge (now part of Glencore) in Canada.

Mr Wollhaf has also held senior commercial and marketing roles across a number of commodities including nickel, cobalt, copper, and PGM’s.

From 2005 to 2012, Mr Wollhaf was based in Brussels, Belgium within Xstrata Nickel International S.A., the trading vehicle responsible for raw material acquisitions and sales for Xstrata Nickel globally encompassing nickel cobalt, copper and PGM intermediates. Mr Wollhaf was responsible for leading purchasing teams based across the United States and Europe with a mandate to fill capacity of the Sudbury nickel-cobalt smelter in Canada, the Nikkelverk nickel-cobalt refinery in Norway, and the BCL nickel-copper smelter in Botswana. Mr Wollhaf was Vice President from 2005 to 2008, then President until his transfer to Asia to head up Nickel Laterite development at Xstrata Nickel in 2012. Since leaving Glencore in 2013, Mr Wollhaf, via his firm KSSM Consulting Pty Ltd, has consulted to a number of international clients in the mining industry predominantly in nickel and cobalt markets (including Jervois).

Mr Wollhaf has an industry leading background in the purchase and sale of nickel and cobalt intermediates, with extensive experience in trading concentrate, matte and mixed metal hydroxide and sulphide products globally. He is familiar with the SMP refinery in Brazil, having visited a number of times on behalf of Xstrata Nickel (now Glencore).

ALWYN DAVEY - Group Manager Corporate & Company Secretary

Alwyn Davey was appointed Company Secretary on 12 April 2017.  Mr Davey has more than 18 years’ experience as Company Secretary in relation to corporate governance, new stock market listings, secondary fundraising, and cross border mergers, acquisitions and investments.  Mr Davey was formerly a member of the executive committee of Cambrian Mining Plc, a diversified mining group listed in London.   He was a Non-Executive Director of Energybuild Group Plc, a UK listed coal company.

Mr Davey’s primary responsibility is to support the Board in its corporate governance and administrative compliance of the Company with ASIC and the ASX Listing Rules, a role he has undertaken for several other ASX-listed entities.

Mr Davey holds an LLB degree from Waikato University, NZ.


Jennifer Hinton has almost two decades of experience working with companies, governments, communities and miners in 20 countries in Africa, Asia and South America. Her expertise ranges from capacity building of mining stakeholders to gender dimensions of mining policy and law to sustainable artisanal and small scale mining. Clients have included the World Bank, USAID, Global Affairs Canada, GiZ, Dutch Ministry of Foreign Affairs, SDC and a range of other governments, UN agencies, companies and organizations. In addition to her current position with Jervois, Hinton is an Adjunct Professor in the Institute of African Studies at Carleton University. Hinton holds a B.A.Sc. (Geol. Eng), M.A.Sc. (Mining and Mineral Process Eng.) and PhD (Mining Eng.) from the University of British Columbia in Canada.

IAN WOOLSEY - Group Manager - IT

Mr. Woolsey has over 30 years of global experience across IT Strategy and Planning, ERP Program Management, Chief Information Officer and Chief Technology Officer roles across the Resources and Government sectors, including a decade of CIO / IT leadership experience with Glencore Xstrata.

Mr. Woolsey joined Xstrata plc in 2003 as the Global IT Projects Manager, responsible for the implementation of standard IT infrastructure across 10 business units in 7 countries. He transitioned to Toronto, Canada in 2006, with responsibility for delivering the successful IT integration of the newly acquired Falconbridge business. In 2008, Mr Woolsey transferred to Xstrata Nickel as General Manager Business Services, where he led the successful deployment of an integrated SAP solution for Xstrata Nickel’s global operations, across 7 sites in 4 languages.

CRAIG MORRISON - Group Financial Controller

Mr Morrison is currently Group Financial Controller for an Australian agriculture business with revenues approaching A$200 million, where he oversees all finance and accounting operations. Previously, Mr Morrison was Group Financial Reporting Manager based in London, United Kingdom, for a NASDAQ-listed LNG midstream infrastructure company with a market capitalization of approximately US$1 billion. Mr Morrison will also be based in Melbourne, Australia.

LOUIS MARTIN - Group Manager - Taxation

Mr. Martin has than 30 years of experience in taxation, commencing his career in professional practice with Deloitte and subsequently Ernst & Young. It was at Ernst & Young as a Senior Manager where Mr. Martin first worked with the current Jervois executive team, advising Xstrata plc (“Xstrata”) on the acquisition of the Canadian base metal company, Falconbridge Limited (“Falconbridge”). Upon the consummation of the acquisition in 2006, he was hired into Xstrata as Vice President of Taxation, and oversaw the restructuring and integration of Falconbridge’s global operations. Following the subsequent acquisition of Xstrata by his most recent employer, Glencore plc (“Glencore”), in 2013, Mr. Martin moved to Baar, Switzerland, as Global Head of Taxation for the copper division, with responsibility for both operating assets and trading activities

ALICIA BROWN – Group Manager – External Affairs

Ms. Brown joined Jervois with more than 25 years of experience, including three years with the Australian Government Department of Defence based in Canberra, and 12 years in leadership roles at global mining company MMG Ltd (“MMG”).  At MMG, Ms. Brown was responsible for leading acquisition and divestment transactions, including management of all key stakeholder relationships and associated regulatory approvals.  Prior to her role leading merger and acquisition projects, Ms. Brown spearheaded strategic studies and political risk analysis for MMG and its predecessor companies in Australia.

Jervois Brasil

CARLOS BRAGA – President and Executive General Manager
VALDECIR BOTASSINI – SMP Refinery Project Director

Jervois USA

MATTHEW LENGERICH – Acting General Manager ICO
MIKE ROMANIUK – ICO Project Director

Jervois Finland

SAMI KALLIONEN – President & Managing Director
PIA LEHOTNEN – Controller in Finance
THOMAS SLOTTE – Director of Plant Support & Administration
JUHA JÄRVI – Technical Director
JEFF BLAZEK – Global Business for Powder Metallurgy
MIKE LACIS – Global Business Manager for Cobalt Chemicals
Subscribe to our email newsletter to receive the latest news and updates
  • This field is for validation purposes and should be left unchanged.