We Provide Sustainability Reporting to Publicly Listed Corporates
We're an African born consultancy that enables established corporate departments to report on key sustainability indices to the JSE and global investor community.
our services
Data Collection, Analysis & Reporting to Rating Agencies
We create bespoke sustainability reports that align with industry-specific standards and meet the reporting requirements of regulatory bodies. Our consultants are trained expertly to conduct in-depth data collection, analysis & verification processes to ensure accuracy, reliability and quality of the information presented to our clients.
Stakeholder Engagement & Materiality Assessment
We facilitate engagement with key stakeholders to understand their perspectives and incorporate their feedback into the reporting process. We help clients identify and prioritise the most relevant ESG factors for their industry, ensuring that the report focuses on the issues that matter most to stakeholders.
Global Reporting Standards Compliance
Our reports adhere to internationally recognized sustainability reporting frameworks such as GRI (Global Reporting Initiative), SASB (Sustainability Accounting Standards Board), and TCFD (Task Force on Climate-related Financial Disclosures).
Impact Measurement
We quantify the positive environmental and social impacts of the company's initiatives, demonstrating its contributions to a more sustainable future.
Benchmarking and Peer Comparison
We provide insights into how a company's ESG performance compares to industry peers, helping identify areas for improvement and competitive advantages.
Strategic Recommendations
Based on the report findings, we offer strategic recommendations for enhancing sustainability efforts and aligning them with business goals.
WE're Partnered with Phaphama SEDI to build the next generation of ESG leaders.
Investing in student talent to build an inclusive economy.
testimonials
I had the pleasure of working with the Jonathan and the WE Sustainability Consulting team while I was Head of Group Sustainability at Old Mutual. They bring broad expertise across the sustainability domain, but what differentiates them is their deep capability in ESG data management. They are able to define and structure ESG data, implement effective collection and management processes, and transform the data into reliable insights that strengthen reporting, support better business decisions, and help organisations improve their ESG ratings. Throughout our engagement, Jonathan and team consistently demonstrated technical excellence, strategic thinking, and a strong focus on delivery. Jonathan easily builds credibility with stakeholders, navigated complex challenges, and delivered high-quality outcomes. I would highly recommend Jonathan and his team to any organisation looking for a trusted sustainability partner with deep data expertise.
Shakira NursooEnterprise Strategy & Sustainability Executive | Old Mutual · Kearney | London Business School · UCT GSB | MBA · PMP · PrEng
Working with Jonathan has been an absolute pleasure. He’s an incredibly passionate sustainability practitioner. He is solutions driven and brings a wealth of data and systems thinking to every project he’s involved in. Over and above his passion and dedication to work, I appreciate Jon’s passion for people and how he aims to empower and upskill those around him at every turn. Working with him and leveraging his understanding of sustainability reporting frameworks, data management and ratings agencies made it easy for me to effectively do my job in reporting for the organisation. He always availed himself and is a super collaborative team member who ensures all inputs are taken into account, while providing strategic guidance on projects.
Lerato SabasabaSustainability Risk Management and Reporting Manager at Land and Agricultural Development Bank of South Africa
I am pleased to recommend Jonathan Weimers, whom I worked with directly during my time as Head of Sustainability at Old Mutual Group. Jonathan consistently provided excellent service, he was reliable, responsive, and committed to completing allocated work to a high standard and assisted others in ensuring the team delivered. He was always available when needed and demonstrated a strong understanding of sustainability data and the requirements of rating agencies. Based on my experience working with Jonathan, I would confidently recommend him for opportunities requiring expertise in sustainability reporting, data, and ratings.
Portia BangerezakoConsultant Karmino Impact | Former Head of Sustainability at Old Mutual
green blog
What Is Corporate Sustainability? A Beginner's Guide, From Someone Who Just Started
I'm new here. That's the premise of this series: there are no silly questions! I'm going to ask my colleagues all the uncertainties beginners have and share what I learn along the way. I decided to start at the very beginning, what is sustainability? I sat down with Jonathan Weimers, the founder of WE Sustainability to begin my quest for knowledge. What does "corporate sustainability" mean?
Are Organisations Prepared for the Impact of AI on ESG?
Artificial Intelligence (AI) is no longer a future concept; it is rapidly becoming part of everyday business. Organisations are using AI to automate processes, analyse data, predict risks, and improve decision-making. As AI adoption accelerates, its influence on Environmental, Social, and Governance (ESG) performance is becoming increasingly significant. But while many organisations are eager to embrace AI, an important question remains: Are they prepared for its impact on ESG?
Beyond the App: How Onafriq Built the Invisible Digital Rails for Pan-African Sustainability
For sustainability professionals, the lesson is clear: high-profile consumer apps cannot solve structural exclusion on their own. Lasting impact requires unglamorous, interoperable, and borderless infrastructure. True sustainability is not achieved by launching another isolated digital wallet; it is achieved by building the open rails that allow capital, climate resilience, and gender equity to scale across an entire continent. If you want to move the needle on the SDGs, stop looking at the storefront. Start investing in the plumbing.
How a Simple Text Message Changed the Face of Money in Kenya
Financial inclusion is a central pillar of sustainability as a discipline. It moves sustainability beyond environmental metrics by proving that economic access and equity are foundational to a resilient society.
The African ESG Frontier: Which African Nations are Leading the Charge in Sustainability 2026
For the corporate sector, sustainability is no longer a CSR initiative—it is a licence to operate and a tool for capital efficiency. In 2026, the following nations have moved beyond policy theory into functional, bankable ESG frameworks that impact your bottom line.
South Africa’s Carbon Tax: Navigating the 2026 Shift
South Africa stands as a pioneer on the continent, being the first African nation to implement a formal carbon tax under the Carbon Tax Act (No. 15 of 2019). As of May 2026, the country is entering a critical period of "Phase 2," where the rules are tightening to meet global climate goals. What's changing in 2026?
Navigating the Grey Zone: Sustainability in an Era of Conflict
In 2026, the global "World at War" scenario has shifted sustainability from a boardroom ideal to a survival discipline. For African companies, the impact of distant and regional conflicts is immediate—affecting everything from the cost of fuel to the integrity of data reporting.
The "Permacrisis" in African Supply Chains: What You Need to Know
In 2026, we are living in a permacrisis—a state where multiple disasters (climate, war, and economic shifts) happen all at once, creating a permanent sense of emergency. For African businesses, this means the "old ways" of trading are no longer enough.
Africa's 2026 Supply Chain: Profit or Perish
For African listed companies, SDG 12 has become the ultimate "hack" for operational resilience. We aren't just being "green" for the sake of it; we are using sustainable production to insulate businesses from failing infrastructure and global inflation.
2025 Recap: The Year Sustainability Got Real & Where to Next for Corporates
The era of the "vague pledge" died in 2025. What replaced it was a high-stakes, data-driven landscape where sustainability became synonymous with economic survival. For the strategic observer, the past twelve months represented a sharp shift from idealism to industrial-scale implementation.
Practical Steps: Building a Stronger, Smarter Food Future in Africa
The core aim of this article is to challenge your organisation to look critically at its current sourcing and supply chain systems. By posing essential questions, we encourage you to identify immediate weaknesses and growth opportunities. Our consultancy stands ready to help you implement the necessary audits and strategic transitions to a sustainable model.
Impact vs. Ideology: Why Profit is the Engine of Sustainability
If you truly want to solve problems like those the G20 just highlighted—then your solution must be profitable. Why? Because only profitable solutions are scalable. Only profitable solutions can attract the capital required to grow from a pilot project to a global programme. Profit isn't the mission; it is the engine of change and the non-negotiable proof that your solution works and will last.
WE're aligned with Old Mutual's mission to create a green, strong & fair society. WE pilot sustainability alongside Old Mutual.
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contact
- Cape Town, Western Cape, South Africa
+27-726584351 - Click to Enter WhatsApp- Jonathan@wesustainability.co.za
- Mon-Fri - 08:00-17:00