London’s go-to consultancy for exceptional projects.

Read our manifesto
Wooden bookshelf filled with a large collection of books.

Meet the Directors.

Nash and Anj Gierak attending a client event at the V&A wearing evening attire.

We’re Nash and Anj, Co-Directors of Bold Green Strategies.

Our sustainability consultancy is built on helping purpose-driven organisations turn good intentions into concrete evidence. As a specialist practice, we provide bespoke, director-led analysis that reflects the operational reality of your business, prioritising activity-based data over the automated estimates common in mass-market models.

We are the team behind some of the UK’s highest first-time B Corp scores, and have delivered carbon footprinting for major event catering, including the BAFTA Film and Television Awards and flagship events at The Natural History Museum.

Education is a core pillar of our work. Through our partnership with Unique Venues of London, we deliver Carbon Literacy training to their members from institutions and organisations, including Somerset House, the London Wildlife Trust, Sadler’s Wells,

the English National Ballet, St Martin-in-the-Fields, the Royal College of Physicians, and Spencer House.

Our reputation as go-to specialists is built on a 100% success rate in ISO certifications and annual surveillance audits, alongside supporting multimillion-pound contract awards and successful King’s Award applications. We leverage a unique blend of expertise—combining UN-backed GRI reporting capability with RIBA ARB architectural rigour—to create strategies that ensure your data is underpinned by forensic accuracy and activity-based evidence.

From technical audits to complex supply chain reviews, we provide the objective, external partnership needed to de-risk your business and protect your reputation. We specialise in high-standard industries—including hospitality, food, architecture, heritage, and luxury—where integrity is everything.

Let’s build your proof.

Professional standards.

Bold Green Strategies is directed by a multidisciplinary team of chartered and registered professionals. Our consultancy is underpinned by the rigorous standards and codes of conduct of the following international bodies:

RIBA logo Chartered Architect
ARB Logo Registered Architect
GRI Certified Sustainability Professional logo
Climate Fresk Facilitator logo
Carbon Literacy Project Facilitator logo
ISEP Affiliate Member badge

RIBA | Chartered Architect – Anj Gierak

ARB | Registered Architect (Reg No: 079488K) – Anj Gierak

GRI | GRI Certified Sustainability Professional – Nash Gierak

Carbon Literacy Project | Trainer (CLT) – Nash Gierak

Climate Fresk | Facilitator - Nash Gierak

Carbon Literacy Project | Facilitator (CLF) – Anj Gierak

ISEP | Affiliate Member – Nash Gierak

Our people.

  • A woman with long brown hair, light skin, and a nose piercing, wearing a white top and a necklace, standing in front of a plain light-colored wall, smiling at the camera.

    Nash Gierak

    BA (Hons) MA (Lond)

    Founding Director

    Sustainability Consultant + Academic Researcher

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  • Close-up portrait of a young man with dark brown hair, wearing a white collared shirt, smiling softly

    Anj Gierak

    ARB RIBA

    Director

    Sustainability Consultant + Award-Winning Architect

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  • A woman with long blonde hair, wearing a striped long-sleeve shirt and dark jeans, standing inside by a large window with trees outside, smiling at the camera.

    Cath Harris

    MBA MCIM

    Marketing Consultant

    Purpose + Impact Communications Specialist

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  • A woman with long, wavy dark hair taking a selfie in a well-lit room with floral arrangements in the background.

    Lina Ahmed

    BA (Hons) PGDip

    Project Coordinator

    Resource Manager + Office Support

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How we work.

Bold Green Strategies is led by the unique partnership of an award-winning Architect and an academic researcher. This multidisciplinary foundation allows us to bridge the gap between technical carbon data and persuasive storytelling.

We bring the analytical rigour of academic research and the structural precision of architectural practice to every sector we serve—from luxury hospitality and global heritage sites to contemporary architectural projects. By combining these two distinct lenses, we ensure your sustainability journey is both technically robust and narratively compelling.

Our results have led to many word-of-mouth recommendations, making us one of London’s go-to consultancies for exceptional, high-stakes projects. We integrate seamlessly with your team, bringing a wealth of project management experience to handle complex transitions from conception to completion.

We start by reviewing existing evidence to refine your strategy, developing the storytelling potential of your data to create a tailored, authentic narrative. This is anchored in active, transparent language designed to reflect meaningful progress and protect your brand from the risks of greenwashing and the CMA Green Claims Code.

We ensure all completed work is underpinned by robust, verifiable data while remaining accessible and engaging to a broad range of stakeholders. By applying definitive milestones and forensic oversight, we ensure clarity and focus at every stage of your organisation’s evolution.

A black metal and wooden bookshelf filled with cream-colored books, with a small table holding a stack of books and framed photos, along with a plant on top of the bookshelf.

Fractional sustainability leadership.

Board-level strategy without the full-time overhead.

For many organisations, the transition to a low-carbon economy requires high-level leadership, but not necessarily a full-time executive hire. We step into the role of Fractional Sustainability Directors, providing the strategic oversight and technical authority needed to drive long-term change.

As an embedded part of your leadership team, we provide a discrete, high-impact presence, bridging the gap between the boardroom and the technical front line.

The Fractional Model

  • Embedded Strategic Oversight: We act as your internal Director of Sustainability, attending board meetings, steering committees, and key project briefings to ensure ESG goals are integrated into every decision.

  • Technical Accountability: Leveraging our ARB/RIBA and GRI credentials, we provide the professional sign-off and technical rigour that standard internal teams often lack.

  • Reputational Guard: We act as a discrete risk filter for CEOs and Directors, protecting the institution or brand from greenwashing and ensuring all external narratives are robust and defensible.

  • Team Empowerment: Instead of just delivering a report, we mentor your existing staff, overseeing the implementation of B Corp strategies, ISO certification, Carbon Literacy, and operational shifts from the inside out.

A desk with a world map on the wall. This image is in the Fractional Sustainability Leadership block.
Diagram illustrating the components of a net zero strategy, including sustainability strategy, certification, ISO, B Corp, carbon reduction plans, impact reports, carbon footprinting, carbon literacy, impact campaigns, social impact, marketing support, legislation tracking, and their interconnected relationships.

Our ecosystem.

This diagram demonstrates how our packages fit together either in our Signature Service or as individual projects into existing systems and frameworks you may have in place.

We can quote for specific projects and packages depending on requirements.

Accessibility - Removing Barriers - Less Jargon - More Action - Making an Impact - Responsible Marketing - Accurate Reporting - Inspiring Training - Creative Problem Solving - Taking Responsibility - Promoting Equity - Doing Things Differently - Thorough Research - Collaboration Over Competition - Non-Judgemental Communication

Being bold.

We believe in