EXECUTIVE

HOLGER RIEMENSPERGER

(BORN 1971)

Chief Executive Officer Executive Director

DipI.Ing (FH), Mannheim University of Applied Sciences

Global Management Certificate, INSEAD AkzoNobel MDP, Hult International Business School, UK

Holger brings a wealth of international leadership experience, having held senior executive roles across Europe and the United States. With deep expertise spanning the mining, chemicals, agriculture and manufacturing sectors, Holger has served in global vice president and senior management capacities at prominent companies including Bunge Loders Croklaan, BASF, Frutarom, and AkzoNobel. Prior to joining AECI, he was the chief operating officer and executive director of K+S Group in Germany. His strategic vision and global perspective continue to drive AECI’s growth and transformation.

IAN KRAMER

(BORN 1970)

Chief Financial Officer

BCom (Hons) in accountancy at the University of Pretoria. Ian’s expertise spans financial reporting, tax, risk management, IT and treasury functions, as well as extensive experience in the mining sector. In 2022, he was appointed acting CFO for AngloGold Ashanti, after being with the mining giant since 2012 and serving as VP of finance. Prior to that, Ian spent 20 years at KPMG, where he was appointed as the KPMG head of mining for Africa.

Stuart Miller

(BORN 1978)

Executive Vice President – Mining

Bachelor of Engineering (Mining) from the Western Australian School of Mines

He is a seasoned mining services executive with over 25 years of experience, having worked in more than 20 countries across EMEA and the Asia-Pacific regions. His expertise spans strategic planning, project management, and cross-cultural leadership, coupled with a deep understanding of both the technical and commercial aspects of mining, particularly in the drill and blast sector.

DEAN MURRAY

(BORN 1969)

Executive Vice President for AECI Chemicals

Chartered Accountant (SA) with a B.Com Honours degree in Accounting, ACMA qualification from CIMA, Strategic Financial Leadership Programme (Stanford University)

Rafael has held the position of Acting Group CFO since May 2023, and has been Finance Executive for AECI Mining since 2015. He knows our business, its customers and leadership well, and is best placed for this role. In his current role of Group Transformation Officer, he will be responsible for the roll out of the approved Group strategy, across all businesses.

RAFAEL FERNANDES

(BORN 1972)

Chief Transformation Officer

Chartered Accountant (SA) with a B.Com Honours degree in Accounting, ACMA qualification from CIMA, Strategic Financial Leadership Programme (Stanford University)

KHABONINA RAMOUPI

(BORN 1968)

Group Chief People Officer

BA, a postgraduate qualification in Industrial Relations and various leadership development programmes

Khabonina is a seasoned human capital executive with 30 years relevant experience, 15 of which were at executive leadership level. Her wealth of experience in human capital as well as the mining chemicals industry, places Khabonina in the ideal position to drive the strategic focus of the Group from a people perspective.

CHERYL SINGH

(BORN 1977)

Group Company Secretary and General Counsel

Cheryl holds B.Proc and LLB degrees Master of Business Administration (GIBS)

Cheryl is an admitted attorney and GIBS MBA alumna with over 15 years’ experience as a Company Secretary, including the legal, compliance and risk management disciplines. Cheryl started her career at a leading law firm and went on to work at various listed and unlisted companies in a number of sectors. She is also a certified Ethics Practitioner with the Ethics Institute of Southern Africa. Cheryl joined the Board on 1 September 2021.

Zanele Salman

(BORN 1980)

Group Chief of Staff

BSc Chemistry (Honours), University of Johannesburg, Diploma in Marketing Management, IMM Graduate School of Marketing. MBA, University of Cape Town, Graduate School of Business

Zanele is a highly experienced business leader with over two decades of executive-level experience in business development, corporate strategy and investor relations. Her career includes leadership roles in leading JSE-listed companies and innovative ventures, where she has consistently driven high-impact projects and transformative strategies. With deep expertise in manufacturing, chemicals and green energy, Zanele brings together strategic creativity and disciplined execution. As Chief of Staff, she plays a critical role in advancing strategic alignment and delivery, enhancing key stakeholder engagement, and ensuring operational coherence across the organisation.

Non-EXECUTIVE

PHILISIWE SIBIYA (48)

Board Chairperson

Chairperson of the Audit Committee Independent non-executive director

South African

BCom (Hons), University of Natal

CA (SA)

Appointed to the Board in 2018

Philisiwe is the founder and chief executive officer of the Shingai Group, an investment holding company focused on empowering African-owned brands. With nearly two decades of executive leadership experience across the African continent, Philisiwe has held senior roles including chief financial officer of MTN South Africa and chief executive officer of MTN Cameroon, where she made history as the first woman appointed to a CEO position within the MTN Group. Her expertise spans finance, governance, risk management and strategic investment. She brings deep expertise in financial leadership, strategic investment, and governance, alongside a proven ability to navigate complex regulatory and operational environments across Africa. Her experience adds to AECI’s oversight of audit, risk, and capital allocation, while her entrepreneurial perspective enhances the Board’s focus on growth and innovation.

SAMUEL COETZER (63)

Independent non-executive director

Canadian

BEng (Mining)

Appointed to the Board in 2022

Sam Coetzer is a seasoned global mining executive with more than 30 years of international experience across key mining regions, including Canada, the United States, South America, Australia, Tanzania, Fiji and South Africa. He has held multiple senior leadership roles in prominent international mining companies, bringing deep operational expertise, strategic leadership and a global perspective to the industry. As a Director of AECI, Sam’s extensive cross-continental experience and proven leadership strengthen the Company’s strategic direction and international outlook.

STEVE DAWSON (60)

Chairperson of the Environment, Health and Safety Independent non-executive director

Australian

BSc (Hons), MBA, Graduate Australian Institute of Company Directors

Appointed to the Board in 2020

Steve Dawson is an independent non-executive director of AECI, appointed to the Board in January 2020. He is the chief executive officer of Nomad Breads. His extensive international career spans executive leadership roles at Incitec Pivot Limited and Dyno Nobel, where he oversaw operations, safety and risk management in the explosives and fertilisers sectors. Earlier in his career, Steve gained valuable experience in South Africa’s mining sector, including a tenure at AECI as Operations and Marketing Manager in the company’s explosives business. Steve’s expertise in operational management, strategic growth and risk oversight contributes significantly to AECI’s governance and strategic objectives.

Non-EXECUTIVE

PHILISIWE SIBIYA (48)

Board Chairperson
Chairperson of the Audit Committee Independent non-executive director
South African
BCom (Hons), University of Natal
CA (SA)
Appointed to the Board in 2018
Philisiwe is the founder and chief executive officer of the Shingai Group, an investment holding company focused on empowering African-owned brands. With nearly two decades of executive leadership experience across the African continent, Philisiwe has held senior roles including chief financial officer of MTN South Africa and chief executive officer of MTN Cameroon, where she made history as the first woman appointed to a CEO position within the MTN Group. Her expertise spans finance, governance, risk management and strategic investment. She brings deep expertise in financial leadership, strategic investment, and governance, alongside a proven ability to navigate complex regulatory and operational environments across Africa. Her experience adds to AECI’s oversight of audit, risk, and capital allocation, while her entrepreneurial perspective enhances the Board’s focus on growth and innovation.
SAMUEL COETZER (63)

Independent non-executive director
Canadian
BEng (Mining)
Appointed to the Board in 2022
Sam Coetzer is a seasoned global mining executive with more than 30 years of international experience across key mining regions, including Canada, the United States, South America, Australia, Tanzania, Fiji and South Africa. He has held multiple senior leadership roles in prominent international mining companies, bringing deep operational expertise, strategic leadership and a global perspective to the industry. As a Director of AECI, Sam’s extensive cross-continental experience and proven leadership strengthen the Company’s strategic direction and international outlook.
STEVE DAWSON (60)

Chairperson of the Environment, Health and Safety Independent non-executive director
Australian
BSc (Hons), MBA, Graduate Australian Institute of Company Directors
Appointed to the Board in 2020
Steve Dawson is an independent non-executive director of AECI, appointed to the Board in January 2020. He is the chief executive officer of Nomad Breads. His extensive international career spans executive leadership roles at Incitec Pivot Limited and Dyno Nobel, where he oversaw operations, safety and risk management in the explosives and fertilisers sectors. Earlier in his career, Steve gained valuable experience in South Africa’s mining sector, including a tenure at AECI as Operations and Marketing Manager in the company’s explosives business. Steve’s expertise in operational management, strategic growth and risk oversight contributes significantly to AECI’s governance and strategic objectives.
FIKILE DLUDLU (DE BUCK) (64)

Chairperson of the Social, Ethics and
Sustainability Committee Independent non-executive director
South African
BA Economics and Accounting, FCCA (UK)
Appointed to the Board in 2019
Fikile De Buck brings over 23 years of executive financial experience to the AECI Board, having held senior roles including chief operating officer and chief financial officer at the Council for Medical Schemes, and Treasurer at the Botswana Development Corporation. Fikile currently serves as the lead independent director of Mercedes-Benz South Africa and is a director of Attacq Limited. A passionate advocate for women’s empowerment in business, Fikile was the founding president of the South African Chapter of the Global Forum of Women Entrepreneurs and is an active member of Women in Mining South Africa. Her broad experience and leadership across sectors, as well as her deep expertise in governance and financial oversight, bring valuable insight and stewardship to AECI.
WALTER DISSINGER (62)

Chairperson of the Risk Committee Independent non-executive director
German
MEng (Industrial)
Appointed to the Board in 2020
Walter Dissinger is an independent non-executive director of AECI and serves as Chairperson of the Risk Committee. He joined the Board in 2020, bringing over three decades of global leadership experience in the industrial and chemical sectors. Walter previously served as global chief executive officer of Votorantim Cimentos S.A., a leading international building materials and sustainable solutions company based in Brazil. Prior to that, he held senior executive roles at BASF across Argentina, Brazil and Germany, including President of the Nutrition and Health division, with responsibilities spanning strategy, business development, and performance chemicals. Walter also serves as an independent director on the boards of several international companies in Brazil. His extensive expertise in governance, risk oversight and strategic innovation contributes significantly to AECI’s long-term growth and resilience.
Billy Mawasha (46)

Independent non-executive director
South African
BSc Electrical Engineering
Appointed to the Board in 2025
Billy Mawasha is a highly accomplished mining executive whose leadership experience spans some of South Africa’s most prominent mining houses. He has held senior roles at De Beers, AngloGold Ashanti, and Kumba Iron Ore, and served as country head of Rio Tinto South Africa as well as managing director of Richards Bay Minerals. As the founder and chief executive officer of Kolobe Nala Investment Company, Billy brings deep industry insight, strategic acumen and a strong track record of value creation. His wealth of experience and visionary leadership make him a valuable asset to AECI in his role as Non-Executive Director.
Nombulelo Moholi (65)

Independent non-executive director
South African
BSc (Electrical and Electronics Engineering), Stanford Executive Program (Stanford University)
Appointed to the Board in 2024
Nombulelo has more than 30 years of experience in the South African corporate sector. She previously served as the CEO of Telkom SA Limited. In 2013, Nombulelo embarked on a career as a non-executive director and has served on the boards of Anglo American Platinum Limited, AVI Limited, Engen and Old Mutual. She brings strong ICT, governance and leadership expertise to the AECI Board, with deep insight into strategy and risk oversight at listed company level.
July Ndlovu (59)

Independent non-executive director
South African
BSc (Metallurgical Engineering), MBL (UNISA)
Appointed to the Board on 1 January 2025
July Ndlovu is a seasoned mining executive with over 30 years of experience across multiple commodities and global markets. Since 2007, he has held senior leadership roles, successfully leading large-scale projects and mergers and acquisitions in Southern Africa and Australia with multiple listings. His international mining leadership and commitment to safety and innovation support the Board’s strategic and sustainability priorities.
PATTY MISHIC O’BRIEN (59)

Independent non-executive director
American
BSBA Industrial Marketing, MBA
Appointed to the Board in 2021
Patty gained her experience in the chemicals and advanced materials industry in her former position as chief commercial officer at UBQ Materials, a climate tech developer of advanced materials made from waste, and as chief commercial officer at CoorsTek, chief marketing officer at A Schulan (now LyondellBasell) and as global director of marketing excellence at Dow Inc. She brings valuable international commercial and sustainability experience to support AECI’s innovation and ESG ambitions.
MARNA ROETS (58)

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Chairperson of the Remuneration & Human Capital Committee Independent non-executive director
South African
BCom (Hons), University of Pretoria
Certificate in Theory of Accountancy, University of Pretoria
CA (SA)
Appointed to the Board in 2020
Marna Roets is an accomplished business leader with deep expertise in financial services, banking and corporate finance, gained through executive roles at leading banking institutions across the African continent. She brings extensive experience in audit, operational efficiency and programme governance, with a strong focus on leveraging digital and data-driven solutions to enable strategic transformation. Her ability to balance innovation with disciplined execution adds significant value to the AECI Board.