Twenty years ago, a small group of practitioners set out with a conviction that seemed self-evident that businesses, given the right frameworks and the right incentives, would choose a more sustainable path.
They were wrong. Not about the destination, but about the timeline, the resistance, and the sheer complexity of the journey.
What follows are the hard-won lessons from two decades of working in the trenches of corporate sustainability across South Africa and beyond. This is not a polished success story. It is an honest reckoning and, ultimately, a story of genuine progress, cautious optimism, and pragmatic lessons anyone can apply.
01: Sustainability is a recalibration, not a product
The mindset shift that changes everything
One of the earliest and most important lessons was deceptively simple: sustainability cannot be sold as a switch you toggle on. It is not a product, not a service, and not a department. It is, at its core, a complete recalibration of how an organisation understands risk, value, and its place in the world.
The dominant assumption in the early 2000s was that once companies saw the business case clearly enough, adoption would follow. What this model underestimated was the depth of the human condition operating within organisations.
"Sustainability isn't a product and it's not a service it's a realisation. It's a complete recalibration of how we do things."Kevin James, GCX CEO
02: From box-ticking to strategic integration
Three phases over twenty years
The evolution of corporate sustainability can be understood in three phases, though many organisations remain anchored in earlier stages.
Driven by visionary individuals who saw sustainability as a competitive advantage and moral imperative. Highly person-dependent and rarely translated into durable institutional change.
Investors and regulators started asking questions. Companies built data infrastructure and aligned with frameworks but largely to satisfy obligations rather than drive strategic change.
The recognition that organisations must understand not only how sustainability risks affect the business, but how the business affects the broader environment and society. IFRS S1 and S2 have accelerated this shift.
"The reporting frameworks give companies that 'aha moment' the realisation that emissions management and risk management are not separate things. They are one thing."Kevin James, GCX CEO
03: The leadership trap
Why progress evaporates and the governance antidote
Perhaps the most frustrating recurring pattern of the past twenty years has been watching genuine, hard-won sustainability progress evaporate when a CEO or sustainability champion departs. We have witnessed large, well-resourced South African corporations dissolve years of embedded sustainability work in a single week under new leadership.
The root cause: sustainability has too often been embedded in individual conviction rather than institutional architecture. When it lives in a person rather than in governance structures, incentive systems, and cultural norms, it is always one leadership transition away from collapse.
The organisations that have made durable progress share one characteristic: sustainability is embedded in governance board-level oversight, executive remuneration linked to sustainability KPIs, and cross-functional integration.
"You can have really good people and really good leaders in an organisation, and they can do a whole lot of really good work, and then they're gone. Two steps forward, two steps back."Ohad Shachar, GCX Sustainability Director
04: Sustainability maturity matters
Know where you actually stand
There is a widespread assumption particularly among large multinationals that size confers sophistication. It does not. A company with operations across fifteen countries can be, functionally, a beginner. A mid-sized South African manufacturer with strong data discipline can be streets ahead.
We assess organisations across six dimensions: data readiness, governance integration, materiality clarity, supply chain visibility, leadership alignment, and stakeholder credibility. An honest maturity assessment is not a judgement it is a navigation tool.
05: Sector insights
Where we've seen change, and where we haven't
Financial Services: The most significant sustainability impact is not their own operational footprint it is where they deploy capital. IFRS S1 and S2 disclosures are reshaping lending and investment decisions.
Real Estate: Fifteen years ago, sustainability was barely on the radar. Today, green building, energy performance, and climate-related physical risk are board-level concerns driven in no small part by South Africa's energy crisis.
Retail & Consumer Goods: A site of genuine tension between sustainability ambition and competitive commercial realities. Progress has been most durable where improvements translated directly into cost savings.
"The sector has moved from 'this is nice to have' to 'this is core to asset value.'"Ohad Shachar, GCX Sustainability Director
06: Resilience over compliance
What sustainability actually means for business
ESG was not hijacked by ideology it was hijacked by the logic of compliance. Companies discovered that meeting the letter of ESG frameworks gave them something more valuable than a reduced environmental footprint: a licence to operate as business as usual. The framework designed to create accountability became a sophisticated tool for avoiding it.
Sustainability, properly understood, is about resilience the ability of a system to absorb shocks, adapt, and continue to function. Carbon footprint is a risk and a dependency. Social licence is a risk and a dependency. Water access is a risk and a dependency. Each one, properly understood, becomes an opportunity for innovation.
"The more efficient you become, the more redundancy you cut out of the system, the more fragile you become. Sustainability is all about resilience but you cannot be resilient if you are not efficient. It is both, not either/or."Cathie Lewis, GCX Head of Impact
07: Beyond carbon
The nine planetary boundaries
Walk into almost any corporate sustainability conversation today and within minutes you will be talking about net zero targets and decarbonisation roadmaps. These are important. But they represent one variable in a planetary system of nine.
Scientists now believe we have crossed six of the nine planetary boundaries identified by the Stockholm Resilience Centre. Carbon is one but biodiversity loss, land system change, and novel entities (plastics and chemicals) are arguably in more critical condition and receive a fraction of the corporate attention.
The organisations doing the most rigorous work are beginning to apply a broader lens. A properly conducted double materiality assessment will surface water risk, biodiversity dependency, and land use impacts alongside carbon.
08: AI as amplifier, not replacement
The risks the field has been slow to reckon with
The efficiency argument for AI is largely valid. What once took weeks of manual analysis now compresses into hours. But stripping human redundancy from organisations does not simply reduce costs it reduces resilience. The institutional knowledge, relationship networks, and contextual judgement that sits in people are not inefficiencies to be engineered out.
Microsoft's carbon footprint increased by 23% since 2020, driven significantly by AI infrastructure energy demands even as the company made major public carbon removal commitments. The case is not against AI; it is for applying the same analytical rigour to AI that we apply to everything else.
09: The geopolitical context
Limits of corporate action
There is something deeply uncomfortable about working with a financial services company in Malawi helping it build carbon accounting systems while major corporations in the developed world, who bear far greater historical responsibility for the climate crisis, are retreating from their commitments. The 'tragedy of the commons' does not resolve itself through good intentions alone. It requires structural interventions: regulation, pricing mechanisms, investor pressure.
10: What actually moves the needle
Five consistent themes from twenty years
"Our job is to answer the 'so what?' to clearly show the tangible impact and value of what we propose. That is where sustainability stops being a concept and starts being a strategy."Cathie Lewis, GCX Head of Impact
Make the financial links explicit. When climate risk is translated into balance sheet impact, and social licence risk is connected to revenue exposure, sustainability becomes something leaders can act on.
Embed sustainability in governance, not just leadership. Board oversight, executive incentives, and cross-functional integration are the mechanisms that make sustainability resilient to leadership change.
Work with partners who carry institutional memory. Long-term advisory relationships that span leadership transitions provide organisational continuity that internal teams often cannot.
Be honest about where you are. The organisations that make the most durable progress are those realistic about their current performance.
Choose your engagements with care. Not every organisation is ready to do meaningful sustainability work. Learning to distinguish is one of the harder and most important lessons of experience.
11: Navigating the frameworks
Choosing without getting lost
The sustainability reporting landscape is now extraordinary in its complexity: GRI, SASB, TCFD, TNFD, IFRS S1 and S2, CDP, B Corp, the UN SDGs, ISO 14001, Science Based Targets. The list grows every year.
The discipline that cuts through this is materiality. For most South African companies, a sensible starting point is IFRS S1 and S2 for financial materiality disclosure, CDP for climate and water disclosure, and GRI Standards as a broader stakeholder reporting baseline. The goal is not comprehensiveness it is clarity, credibility, and efficient use of resources. More frameworks do not mean more sustainability.
12: A cautious optimism
Twenty years on
The frameworks are better. The reporting is more rigorous. The financial links are being made explicit in ways they never were before. A new generation of leaders is entering organisations having grown up in a world where climate change is not an abstract future concern but a present operational reality.
Discovery is selling renewable energy. Attacq is running workshops on systemic impact with genuine intellectual rigour. The Reserve Bank is doing double materiality assessments. These are not small things they are the slow accumulation of exactly the kind of change that takes two decades to build.
Twenty years of experience with all its frustrations, hard-won insights, and genuine moments of breakthrough is precisely the foundation from which the most impactful next chapter can be built.
GCX is a sustainability strategy and advisory firm with more than twenty years of experience working across South African and African markets. This article draws on conversations and reflections from the GCX team and is intended as a resource for sustainability professionals and the organisations they serve.