About Us
Your Anchor
for Industrial
Decarbonisation
Eastern Polysilicon is a vertically integrated industrial powerhouse dedicated to producing the essential crystalline foundation for the global green energy and semiconductor sectors.
Planned by Sikhuliso Resources (Pty) Ltd as South Africa’s first integrated Metallurgical-Grade Silicon (MG-Si) and Polysilicon production ecosystem, we pride ourselves on turning the grit of today into the shine of a sustainable tomorrow.
As the continent’s first large-scale polysilicon supplier, we are positioning South Africa as the high-tech heart of the global green energy revolution. We do not just produce silicon; we produce certainty, structural integrity, and long-term legacy.
Eastern Polysilicon exists to fuel a sustainable future by refining the earth’s potential into high-purity precision.
Our Vision
To be recognised as the regional anchor of industrial decarbonisation and the primary catalyst for the South African semiconductor value chain.
Our Difference
Eastern Polysilicon is the only African-based manufacturer that transforms raw minerals into high-purity crystalline foundations for the global solar and semiconductor supply chains.
We provide the crystalline certainty that the global energy transition requires, rooted in the integrity of African Quartz.
Driven by
Uncompromising Principles
We are steadfast in our commitments and stay true to our word. Grounded in loyalty and duty, we honour the future of the earth. We act with respect and believe in safety, fairness, and equality.
01
Honourable Stewardship
Our morality is lived out in our conduct – in how we treat both the earth and people. Wisdom, safety, empathy, and honesty are the lenses through which we view every decision.
02
Grounded Morality
We honour our commitments and stand by our decisions – taking accountability in every interaction. Our role in securing a better future is one we take seriously, as we strive for greatness.
03
Accountable Excellence
Executive Leadership
& Governance
Supported by majority shareholder Dlanubekele Holdings, Eastern Polysilicon is led by experienced executives in heavy industry, capital structuring, chemical processing, and mega-project execution.
Mr. Sipho Tsotsi
Executive Chairman
Role & Focus: Spearheads strategic orientation, capital market access, and high-level sovereign stakeholder relations. Background & Credentials: Bringing nearly 30 years of executive management and entrepreneurial leadership in heavy industry and mining, Mr. Tsotsi held senior management roles at major corporate institutions, including Telkom and Siemens. In 2007, he founded Sikhuliso Resources, an independent gold mining enterprise, subsequently leading the acquisition of a 16% stake in TBO (a subsidiary of Harmony Gold), where he has served as Board Chairperson since 2015. As a founding force behind Eastern Polysilicon, he combines deep commercial foresight with a passion for building enduring, multi-generational African enterprises that drive sustainable socio-economic impact.
Ms. Jabulile
Mlangeni (CA-SA)
– Financial Director
Role & Focus:
Oversees capital expenditure allocation, financial model auditing,
internal controls, and debt-equity structuring.
​
Background & Credentials:
A qualified Chartered Accountant CA(SA) with over a decade of progressive experience, Ms. Mlangeni is an expert in financial governance, technical audit quality, and public-sector accountability. Serving as Senior Technical Specialist within the Material Irregularity Business Unit at the Auditor-General of South Africa (AGSA), she enforces technical compliance under the Public Audit Act. Recognised as one of the Top Three Overall Participants in the continental AFROSAI Women Leadership Academy (2023–2024), she also manages a private tax and financial advisory practice, bringing institutional rigour, technical mastery, and commercial agility to Eastern Polysilicon’s capital structuring.
Ms. Jabulile
Mlangeni (CA-SA)
Financial Director
Role & Focus: Oversees capital expenditure allocation, financial model auditing, internal controls, and debt-equity structuring. Background & Credentials: A qualified Chartered Accountant CA(SA) with over a decade of progressive experience, Ms. Mlangeni is an expert in financial governance, technical audit quality, and public-sector accountability. Serving as Senior Technical Specialist within the Material Irregularity Business Unit at the Auditor-General of South Africa (AGSA), she enforces technical compliance under the Public Audit Act. Recognised as one of the Top Three Overall Participants in the continental AFROSAI Women Leadership Academy (2023–2024), she also manages a private tax and financial advisory practice, bringing institutional rigour, technical mastery, and commercial agility to Eastern Polysilicon’s capital structuring.
Mr. Vernon
Ignatius Steenbok
Technical Director
Role & Focus: Directs metallurgical and chemical plant engineering configurations, technological transfer, operational readiness, and product purity validation. Background & Credentials: A senior operations and business development executive with over 30 years of experience across mining, minerals processing, and mega-capital projects, Mr. Steenbok specialises in transitioning complex industrial facilities from inception to fully commissioned, 90%+ availability operations. His career highlights include contributing to the industry-standard Mintek flotation process for hydrometallurgy PGM plants, building Africa’s first stainless steel passivating facility at Columbus Stainless Steel, developing UG2 chrome recovery models, and driving the 8-fold commercial growth of Crocodile River Mine. He ensures world-class engineering execution, zero-harm standards, and technical transfer for 11N- grade silicon production.
Mr. Percival Mosweu
– Project Manager
Role & Focus:
Coordinates localised construction sequencing, EPCM integration, SEZ regulatory compliance parameters, and industrial site layout execution.
​
Background & Credentials:
A process engineer, corporate executive, and entrepreneur with nearly 40 years of experience in process design and mega-project management, Mr. Mosweu holds a GCC (Factories) qualification. His distinguished career spans leadership roles across South African Breweries, Rotek Engineering (Iscor V2 mega-project), and a decade at Transnet Freight Rail as Chief Operating Officer and GM of Engineering & Technology, where his process redesigns achieved record export tonnages. As Vice President of New Business Development at Foskor, he led major chemical beneficiation initiatives to implementation readiness before founding Setibo Investments in 2013 to provide high-level consulting engineering and project delivery services.
Mr. Percival Mosweu
Project Manager
Role & Focus: Coordinates localised construction sequencing, EPCM integration, SEZ regulatory compliance parameters, and industrial site layout execution. Background & Credentials: A process engineer, corporate executive, and entrepreneur with nearly 40 years of experience in process design and mega-project management, Mr. Mosweu holds a GCC (Factories) qualification. His distinguished career spans leadership roles across South African Breweries, Rotek Engineering (Iscor V2 mega-project), and a decade at Transnet Freight Rail as Chief Operating Officer and GM of Engineering & Technology, where his process redesigns achieved record export tonnages. As Vice President of New Business Development at Foskor, he led major chemical beneficiation initiatives to implementation readiness before founding Setibo Investments in 2013 to provide high-level consulting engineering and project delivery services.