Executive Directors

Andries J van Heerden


B.Eng (Mech), MBA (University of Stellenbosch), Government Certificate of Competence, Advanced Management Programme (Insead Business School)

Andries van Heerden has been serving as the chief executive officer of Afrimat Ltd since November 2006. He is also a member of the company’s board of directors.

Under Van Heerden’s leadership together with the directorate and his management team, Afrimat is committed to becoming the world’s most respected construction materials and industrial minerals supplier.

Prior to serving in this role, he was the Chief Executive Officer of Lancaster Group (Pty) Ltd (2005), the Managing Director of Prima Quarries (Pty) Ltd. (2003-2005) and served in various other operational management roles, mostly in the mining and quarrying industries.

Andries is well known for his visionary leadership and was instrumental in 2006 in the formation and listing of Afrimat on the JSE from the merger of Prima and Lancaster.

Being a results driven, performance oriented people person, Andries is constantly investing time and energy in refining the business’ strategy. He is passionate about people and leadership development.

With his extensive experience in strategic positioning, engineering, marketing and finance Andries was humbled in November 2017 when he was named the winner of the masters’ category of the Ernst & Young World entrepreneur of the year award for the Southern African region.

Pieter GS de Wit


B.Compt (Hons), CA (SA), ACIS, Post Grad Cert in Tax (Unisa), MBA (Cum Laude) (University of Stellenbosch), The Emerging CFO: Strategic Financial Leadership Program (Stanford University)

Pieter was appointed as Chief Financial Officer from 1 March 2016. Prior to his appointed as Chief Financial Officer he was the Regional Director of the group’s Kwazulu-Natal and Free State operations where he was responsible for the strategic repositioning of these businesses since 1 October 2013. He also held various other leadership roles in Afrimat since joining the group in 2008, including Company Secretary and Chief Audit Executive. He qualified as a chartered accountant in 2002 and worked for 16 years at PriceWaterhouseCoopers prior to joining Afrimat. Since his appointment as CFO, Pieter’s focus is to transform the finance function into a business partner, adding value to the business. To achieve this he strives to automate and streamline the financial reporting and processes, moving towards near real time reporting, and use predictive analytics to assess where the business is heading.

Collin Ramukhubathi

Executive Director

B-Tech in Mechanical Engineering, MBA (Stellenbosch University) | Action to Analysis: Executive Leadership Development Program (Stanford University)

Collin was appointed as Executive Director from the 01 November 2019. He started his career with Afrimat in 2009 as a Quarry Manager. He served in various leadership roles like Group Manager: Mineral Resources Compliance and General Manager: Sustainability. He now holds a position as Executive Head: HR and Sustainability.

Before joining Afrimat in 2009, Collin had a vast knowledge in open cast mining which he has gained over 14 years in the industry. Other positions previously held by him includes civil yard manager (Basil Read) ,Project engineer and Senior Works Manager (AfriSam) and Quarry Manager (Portland Quarry). He is also a member of the Institute of Quarry in South Africa.

Gerhard Odendaal

Executive Director

National Higher Diploma (T4) (Civil Engineering), C-Level programme (Stanford University Graduate School of Business)

Gerhard was appointed as Executive Director and as a member of the Social and Ethics Committee of the Company from 12 April 2022. Gerhard is highly experienced with a demonstrated history of working in the construction, materials supply, and mining and metals industry.

In his 17-year career at Afrimat, he honed skills in project risk assessment, contract management, project management, strategic planning, and change management. He has a track record of excellent execution and more recently played a key role in the turnaround of distressed mining assets.

Non-Executive Directors

Loyiso Dotwana

B.Sc Civil Engineering (University of Cape Town)

Loyiso has worked as a civil engineer in design and project management for more than 20 years. He specialised in design and contract administration of township services, rural and urban roads and national roads. He has been involved in the conceptual and detailed design of bulk services for the Coega Industrial Development Zone in Port Elizabeth. Loyiso founded Illiso Consulting (Pty) Limited, one of South Africa’s largest black owned consulting engineering companies, of which he is currently a director and the major shareholder.

In his 17-year career at Afrimat, he honed skills in project risk assessment, contract management, project management, strategic planning, and change management. He has a track record of excellent execution and more recently played a key role in the turnaround of distressed mining assets.

Independent Non-Executive Directors

Francois Louw


BEng (Mechanical), MBA

Francois holds a BEng (Mechanical) and MBA degree and has 34 years’ of experience in the mining industry. He has extensive experience in company strategy, major capital projects, commercial negotiations, business development and engineering. He was a member of the inaugural executive committee when Kumba Iron Ore Limited, a subsidiary of the Anglo American plc group, was listed on the JSE in November 2006 and served on the executive committee and the board of Sishen Iron Ore Proprietary Limited, a Kumba Iron Ore Limited subsidiary up until April 2015. Prior to this Mr Louw served in various operations and project positions in the iron ore, heavy minerals and coal sectors.

Gert J Coffee

B.Sc B.Eng. Mechanical (Industrial)

A registered professional engineer, Gert has spent the past 35 years in the civil construction and materials supply industries in various executive management capacities. He joined Afrimat in January 2010.

Sisanda Tuku

CA (SA), BCom Financial Accounting (Hons), International Women’s Forum Leadership Foundation Fellows Programme (Harvard and INSEAD Business Schools)

Sisanda was appointed as a Non-Executive Director and as a member of the Audit and Risk Committee of the Company from 1 May 2022. She has over 18 years of experience in the financial services sector, with extensive experience in structured finance, capital raising, corporate finance, infrastructure, and public-private partnerships financial advisory. Ms. Tuku is currently the Chief Executive Officer of THEZA Capital (Pty) Ltd, a financial advisory services company with a 14-year track record of ground-breaking transactions.

Prior to this, Ms. Tuku was part of Investec Bank’s structured finance team where she was responsible for funding transactions in the mid-market space, including mergers and acquisitions, leveraged buyouts as well as black economic empowerment deals. Ms. Tuku is passionate about elevating people, the businesses she is involved in as well as developing her leadership skills.

Phuti RE Tsukudu

M.Ed (University of Bristol), Postgraduate Diploma in Adult Education, B.A. (SW)

Phuti is an organisational development and management consultant and is currently managing director/senior consultant at Tsukudu Associates and a partner/senior consultant at CRG PPS. She has extensive experience in organisational development, human resources management and human resources development in the public and private sectors – over 25 years’ experience as an independent consultant and over 10 years as a community development practitioner working in the development and education arena. She continues to hold a number of board positions.

Jacobus Frederick (Derick) van der Merwe

CA (SA), BCompt (Hons)

Derick, a chartered accountant, has extensive experience in the property and real estate, construction, and manufacturing industries. He has worked at Imperial Cold Storage and as regional financial director in the Stocks & Stocks group. Derick was financial director and then managing director and CEO for the Victoria & Alfred Waterfront, (“V&AW”) in Cape Town. He is currently the CEO of People Spaces a development management and consultancy company. Derick is a medal holder of FIABCI (International Real Estate Federation), an associated member of the Chartered Institute of Building and past member of S.A. Institute of Realtors. He is a non-executive director for the PNA Stationers group and trustee of Two Oceans Aquarium and has served on various other boards of directors and trustees.

Johannes HP van der Merwe

CA (SA), Master in Income Tax (University of Pretoria), M Phil Finance (Cambridge University); Advanced Management Programme (Harvard Business School) Challenge of Leadership (Insead Business School)

Johan joined Investec Asset Management in 1997 as Head of Resources and became the Global Sector Head of Resources in 2000. He was also a director and Executive Committee member of Investec Asset Management.

In 2002 he was appointed as CEO of Sanlam Investment Management.In May 2003 he was appointed CEO of the Investment Cluster responsible for all the investment businesses in the Sanlam Group. In 2005 and 2007 he took, in addition to Sanlam Investments, responsibility for Sanlam Capital Markets and Sanlam Employee Benefits respectively.

He is now Co-CEO of African Rainbow Capital and a non-executive director on the Sanlam Investments, Sanlam Capital Markets and Sanlam Employee Benefits Boards.

Nicolaas Kruger

Chartered Director (CD(SA)). Fellow of the Faculty of Actuaries (FFA); Fellow of the Actuarial Society of South Africa (FASSA). Advanced Management Programme (Oxford).

BCom (Mathematics) Cum Laude, FFA (Fellow of the Faculty of Actuaries), AMP (Advanced Management Program, Oxford University), CD(SA) (Chartered Director).

Nicolaas Kruger is a business executive with more than 30 years’ experience in South Africa. He has extensive experience as a director and currently serves as a non-executive director on various boards, including Sanlam, GWK (chairman), Gen Re, Granor Passi, Brenn-O-Kem (chairman) and Afrimat. He served as Group CEO of the insurance group MMI for seven years and was chief actuary of Momentum for 10 years. He has gained experience doing business internationally, including various countries in Africa. He has also gained in-depth experience of corporate transactions throughout his career. He served on the board of the Association for Savings and Investment South Africa (ASISA) for 9 years.

Tanya Pretorius

Afrimat: Head of Communications

Vanessa Ingram

Keyter Rech Investor Solutions