And as he explains, today’s sustainability professionals aren’t simply under-resourced. They’re tasked with being polymaths—strategists, diplomats, auditors, and ethicists—all under growing scrutiny and with shrinking support.

“Sustainability is like a Swiss Army knife. It does a little bit of everything,” Jack says. “But unfortunately, it always seems to be the department that gets its legs chopped off first.”

🛠️ The Rise—and Frustration—of the Corporate Generalist

Jack’s journey began not in a boardroom, but in the wilds of the UK’s Peak District, where childhood experiences in nature formed the roots of his professional ethos. After studying zoology and later earning a master’s in environmental technology at Imperial College London, he entered the workforce at a time when sustainability wasn’t yet codified—it was a curiosity, a cost, or a PR side note.

Now, two decades on, Jack is deeply embedded in the inner workings of ESG governance. But the job has changed. Dramatically.

Sustainability teams are, he argues, often the first to face cuts. And even when intact, their scope is impossibly broad:

• Ensure compliance with a shifting regulatory landscape.

• Build internal cross-departmental governance systems.

• Communicate externally with credibility and legal precision.

• Shape long-term strategy while responding to daily crises.

All with skeleton staff, tight budgets, and intensifying political pressure.

“We’re expected to be crystal ball mind readers, functional experts, accountants, legal gurus—literally everything under the sun.”

⚖️ Green Hushing, Political Polarisation & the Ethics of Silence

One of the most revealing parts of Jack’s conversation centres on communication—or the growing reluctance to do so. Reflecting on a 2023 Axios article about the trend towards subtler ESG messaging, Jack doesn’t dispute the phenomenon, but he adds a more human angle.

Green hushing, he argues, can be soul-destroying. Not just because it silences companies, but because it silences the people within them trying to do the right thing.

“Not being able to say something can be heartbreaking. There aren’t many regular places for people in sustainability to get their stories across.”

This isn’t about silencing fluff—it’s about losing the stories and case studies that drive peer-to-peer innovation and cross-sector learning. And while Jack believes internal collaboration will endure, he warns that without external communication, public understanding will continue to fragment.

“We need to encourage better decision-making by consumers. We can only do that if we talk and engage and communicate.”

🧭 The Say-Do Gap & Brand Activism

Jack’s insights into brand alignment are refreshingly nuanced. While there’s clear fatigue with companies hopping on every social cause, Jack resists the idea that corporates are purely cynical or performative.

He identifies a more structural problem: companies are increasingly reactive—nudged by NGOs, employees, trade groups, even rivals—into engagement. That’s not inherently bad. But it raises big questions:

• Are we aligning with this issue because we believe in it, or because we fear being left behind?

• Do we have the systems, strategy, and budget in place to act on it?

• Will this be a sustained commitment or a one-month campaign?

“There needs to be a little more pragmatism and seriousness about what the company is going to be able to do before it says what it’s going to do.”

Jack isn’t calling for less ambition—he’s calling for more integrity.

🎯 The Magic Wand? Give Sustainability the Tools It Needs

Asked what he’d do with a magic wand, Jack doesn’t hesitate. He wouldn’t conjure up more pledges or frameworks. He’d give sustainability professionals what most already have to beg for: adequate resources.

“I’d wish my colleagues had the tools, the budgets, the buy-in. We can’t keep expecting strategic transformation from underfunded teams.”

It’s not just a plea for fairness—it’s a warning. Without structural investment, the very people tasked with delivering long-term value will burn out before they ever reach the summit.

“You don’t have to have sustainability in your title to be a sustainability professional.”

This episode delivers one of the most practical, nuanced, and insightful explorations to date of how the sustainability movement has evolved—and what organisations consistently get wrong when building their teams.

The Turning Point: When Ethics Met Enterprise

Ellen didn’t always plan to work in sustainability. As a student, she had her sights set on becoming a stockbroker—until a trip to post-Berlin Wall Poland changed everything. Witnessing educated families struggle with food rationing and clothing scarcity, she realised the power business could have in driving positive social impact.

“I wanted to help. I said, I want to do good with business.”

That insight led to her first informal case of “cause marketing”: importing hand-knit sweaters from Polish women and reselling them at a markup, with profits returned to the community. It wasn’t just smart—it was ethical entrepreneurship in action.

From Cameroon to Corporate Boardrooms

Ellen joined the Peace Corps in Cameroon, working with coffee co-operatives and woodcarvers, deepening her understanding of trade, fairness, and international development. This foundation became the launchpad for a sustainability consultancy career, with roles at Levi Strauss, HP, the World Bank, and more.

But a piece of advice changed her trajectory again: “You need to niche.” Recognising her talent for connecting people, Ellen launched Weinreb Group to specialise in one thing: placing changemakers in sustainability roles.

“We put changemakers to work.”

What’s Really Happening in the CSO Job Market?

Her firm’s flagship research—the Chief Sustainability Officer Report—tracks the evolution of CSOs in U.S. publicly traded companies. The 2025 edition found:

• 📊 CSO numbers have grown from 30 in 2011 to 220+ in 2025.

• ⚖️ Only 50% had sustainability in their prior job title—many came from legal, supply chain, or corporate affairs.

• 🧠 Top attribute for success? Being a “corporate chameleon.”

“You need at least one person to own it. Someone who can interpret the external world and influence internally.”

Common Mistakes Companies Make

Ellen was candid about where companies go wrong:

• Underestimating the role: “They think they can just hire a junior person. Then they realise, this is way bigger than anticipated.”

• Prioritising compliance over impact: “It’s easy to lose sight of strategy in the fog of regulation.”

• Not aligning with business strategy: “Sustainability has to make business sense. It’s not just philanthropy anymore.”

The Future of Sustainability Leadership

What skills will tomorrow’s CSOs need?

• Financial fluency: understanding the language of CFOs and audit teams

• Strategic systems thinking: balancing macro trends with granular data

• Internal diplomacy: navigating complex stakeholder ecosystems

• Adaptability: “Being a chameleon” across departments and agendas

“The CSO needs to speak the language of whoever they’re talking to—legal, finance, supply chain. It’s about embedding, not siloing.”

✨ Magic Wand Moment

If Ellen could change one thing in the commercial world?

“I’d give consumers full information. So they could make truly informed choices.”

It’s a deceptively simple goal—but one that underpins the entire ESG movement.