Meet our Exco

B.Com and MBA, University of South Africa

Appointed to the Board: 1 January 2024, Executive Director

Mike joined Gold Fields as CEO on 1 January 2024, based at the Corporate Office in Johannesburg. Following an early career in industrial services Mike joined the mining sector in 2001 in BHP’s human resources department. He rose through the ranks at BHP to head the Mozal Aluminium Smelter project in Mozambique in 2009 and thereafter was appointed the group’s President Human Resources, based in Melbourne.

When BHP created South32 in 2015, Mike became President and Chief Operating Officer of its global aluminium, nickel and South African manganese and energy coal businesses. In 2022, he was appointed CEO of Chaarat Gold, an AIM-listed junior gold miner, a position he held until his appointment to Gold Fields.

CA(SA), Bachelor Business Science, PGDA, University of Cape Town

Alex became Gold Fields full-time CFO and Executive Director on 1 March 2025, after having acted as Interim CFO since April 2024. He joined Gold Fields in 2014, focusing on SOX and technical accounting work in the Finance Department. After gaining wider experience, he was promoted to VP Corporate Finance in 2022, responsible for the funding requirements of the Group. Prior to Gold Fields, Alex Dall worked at KPMG, where he completed his articles in the energy and natural resources department.

B Tech in Mining, Witwatersrand Technicon, South Africa; Executive Development Programme, Gordon Institute of Business Science (GIBS); Accelerated Development Programme, London Business School.

Martin is Chief Operating Officer at Gold Fields. During 2023 he was the Interim CEO of the Group, taking over when the previous CEO Chris Griffith resigned in December 2022. He joined Gold Fields as Executive Vice President: South Africa in May 2017, leading the successful ramp up of the South Deep mine since then. Prior to joining Gold Fields, he was Chief Operating Officer at De Beers South Africa. Martin has 38 years of mining experience, starting his career as a learner miner and holding a number of operational and technical roles before taking up mine manager positions at various operations across De Beers. After moving to Group level at De Beers, he held positions as mine strategist and business development manager before being appointed Chief Operating Officer in 2011.

Executive Vice-President: Group Head of Legal & Compliance

LLB (Hons), University of Bristol, United Kingdom; GAICD

Ms Carter is a dual-qualified lawyer with over 20 years’ experience in both the UK and Australia, with an extensive background across the gold and nickel sectors. With complimentary experience in commercial and corporate affairs management in the mining sector, she is also currently Chair of the Gold Industry Group, an industry association that seeks to promote the Australian gold sector, having been a director since 2016.

In her twelve years with Gold Fields, Ms Carter has held the roles of Vice President: Legal and Compliance, and Vice President: Legal & Corporate Affairs as part of the Australian regional executive team. As Gold Fields’ Executive Vice President and Group Head of Legal and Compliance, she leads a global legal team responsible for all legal and governance matters across the group.

Executive Vice President: South Africa

BSc (Hons) Geology, University of Cape Town; Graduate Diploma Engineering, Wits University; MBA Wits University; Sustainable Business Strategy, Harvard University.

Mr Mokoatle is a geologist with over 27 years' experience in the mining industry. He joined Gold Fields in October 2017 as General Manager for South Deep and became Executive Vice President for the Gold Fields South Africa on 1 June 2023 after serving as acting EVP since 1 July 2022.

Prior to joining Gold Fields, Mr Mokoatle spent seven years with AngloGold Ashanti and 15 years with De Beers, where he was the Head of MRM and Technical Services before taking on the role as a General Manager for the Voorspoed and Venetia mines.

He is a trustee for the South Deep Education Trust, South Deep Community Trust and the South Deep Joint Venture Rehabilitation Trust.

Executive Vice President: People and Sustainability

B.Eng (Chem), University of Stellenbosch; MDP, Gordon Institute of Business Science

Mariette was appointed to the position of Executive Vice President: Sustainable Development on 1 June 2024 and became Executive Vice President: People and Sustainability from 17 March 2025. She joined us from South32, where she was Vice President of Health and Safety Culture and also led the Group Risk & Assurance and Group Supply functions. In a career spanning 28 years, Ms Steyn has held various operating and functional leadership positions at AngloGold Ashanti, Samancor Chrome, BHP, and most recently, South32. Geographically she has worked in Australia, Southern Africa and the Americas.

Executive Vice-President: Investor Relations and Corporate Affairs

B Bus Sci (Hons Finance) - Accounting, Economics, Finance from the University of Cape Town

Ms Magagula joined Gold Fields on 1 September 2023 from African Rainbow Minerals (ARM), where she was the Executive Director: Investor Relations and New Business Development. Jongisa started at ARM in 2009, as the Head of Investor Relations. Her role expanded over the years as she took on additional responsibilities, including business development. She was appointed to the ARM Board in December 2019. Prior to ARM, Ms Magagula worked in the mining division at Absa Capital.

Executive Vice-President: Strategy, Planning and Corporate Development

Chris joined Gold Fields as EVP Strategy and Corporate Development on 1 September 2024. He is an experienced global investment banking professional and capital markets executive, who has been involved in many of the transformative transactions in the mining industry over the past 20 years. Prior to joining Gold Fields, he was Global Head of Mining at CIBC Capital Markets where he led a global team with offices in the major mining centres around the world. Chris started his investment banking career at Morgan Stanley, where he held numerous positions in New York, London and Toronto.

Group Chief Technical Officer

BEng (Electrical and Electronic Engineering), University of Johannesburg; BSc (Information Technology), University of Johannesburg

Mr Swanepoel has 30 years' experience in mining and processing, obtained at Gold Fields' operations in South Africa, Australia, Ghana, Peru and Chile in a range of operational, project and regional consulting roles.

During the past seven years, Mr Swanepoel was integrally involved in the conceptualisation and development of the Salares Norte project in Chile. As Study Manager he was responsible for delivering all technical studies and engineering required for the project and later as the Head of the Technical and Improvement Area, for providing strategic direction, technical oversight, and operational support to the Salares Norte team. As Gold Fields' Group Chief Technical Officer he is discipline head of the key mining technical functions (including geology, mining and metallurgy) across all operations.