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The support and expertise you need, just when you need it

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About Sustainable Xperts

Navigating sustainability or ESG requirements can be overwhelming – especially when unexpected challenges arise. Many clients come to us when they find themselves under pressure, facing complex sustainability clauses in tenders, struggling with compliance documentation, or needing to demonstrate environmental commitments to secure partnerships. Without the right expertise these challenges can lead to delays, financial risk, or lost opportunities. 

That’s where we come in.  We remove that uncertainty by delivering the right level of support to meet your regulatory obligations, business objectives and progress your overall sustainability or ESG strategy.  Sustainability expertise delivered by experienced business advisors and technical experts.  Taking a pragmatic approach to resolving your resource and knowledge challenges.

Let’s turn sustainability challenges into strategic opportunities. Get in touch today.

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Our Xperts

Rondi Allan of Sustainable X
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Rondi Allan - strategy, supply chain and communication

As a co-founder of Sustainable X, Rondi has breadth and depth of experience helping organisations develop and execute sustainability and ESG strategies.   Formerly a Price Waterhouse Chartered Accountant, Rondi also has board level experience in manufacturing and supply shain organisations in the UK and internationally.

Claire Louise Chapman - social value

Claire Louise is a social sustainability professional supporting organisations with Social Value strategy and work winning.  Her experience across public and private sector organisations from both client and supply chain perspectives give her a unique perspective to enable genuine value creation. She is an SROI and Social Impact Practitioner, Fellow of the Institute for Corporate Responsibility and Sustainability and has acted as Chair for the ICRS Fellows Hub.

claire louise
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virginia cinquemani
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Virginia Cinquemani - training and motivation

Virginia empowers sustainability professionals and teams to amplify their impact. With two decades of sustainability work under her belt, Virginia has channelled her expertise into coaching and training, guiding others to engage clients, management and colleagues effectively in sustainability.

She is the author of two books, “SustainABLE” (2020), a self-help manual for sustainability professionals that want to find success and impact in this industry, and the best-selling “The Good Communicator” (2025).

Andy Harris - carbon credits / offsetting

Andy is Managing Director and co-founder of Nature Broking. An expert in the voluntary carbon markets. With a wealth of experience in climate and sustainability risk, his background is in banking and finance where he spent a number of years as a management consultant, including working on ESG initiatives in some of the world’s largest banks.

andy harris
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oppo 0
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Jonathan Hart Smith - recruitment​

Jonathan has over 25 years’ experience in the recruitment sector, having built, grown and internationalised recruitment companies.

With his passion about making a difference, whether that be in the workplace, the environment or society. he has established ESG REC, a growing international Recruitment and Employment company supporting a diverse range of clients in the ESG and Sustainability sectors.

David Hawes - carbon accounting​

A leading carbon accountant with extensive measurement, reporting and training experience.  David is a founder of Net Zero International and also  experienced leader in customer centric organisations with large field teams.

David Hawes of Sustainable X
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Nick Reilly of Sustainable X
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Nick Reilly - strategy, training and development

A co-founder of Sustainable X, Nick has strong strategy development, impact assessment, training and change management expertise.  He has extensive SME leadership experience as an MD and CEO in the construction and utilities sectors.

Mark Sayers - resource efficiency / waste

Mark empowers businesses with clear, actionable insights on:

• Eco-design – minimizing cost impacts from the ground up
• Extended Producer Responsibility (EPR) – ensuring compliance, managing data, while reducing costs
• Takeback Programs – creating resource efficient, engaging product return solutions
• Waste Legislation – Helping businesses adapt to the evolving regulatory landscapes

Mark’s approach is pragmatic, results-driven, and designed to turn sustainability compliance into a competitive advantage.

mark sayers
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zara s
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Zara Sloane - diversity, equity and inclusion​

Zara partners with organisations to help leaders unlock the conditions for high performance, innovation, and inclusion. Her work is rooted in real-world business challenges, ensuring strategies don’t just sound good on paper but deliver tangible impact.

What our clients say

"The workshop and report was overseen in a very diligent, accurate and thorough way and (dare I say it?) enjoyable manner! The content inspires us to move forward in a sustainable (and profitable) way. As a young business, your report also made me feel good about where we are, whilst recognising that we have an important part to play in the future. I am very happy to recommend your company (in fact I already have!) to others at the start of a similar journey no matter large or small and look forward to staying in contact as we progress Curious Universe on this path."
John StyringCurious Universe
John Styring
"I personally found the entire experience inspiring, extremely interesting and educational and was surprised by how much we can gain as a business from making even more positive social and environmental impacts.  Even though we discussed all the positive impacts we already make on the day, it was still great to see them in black and white in your report.  It’s a great framework for us to use going forward.”
Jamie AllamAmthal Fire & Security
Jamie Allam
“Thank you for spending your time with us and doing such a great job getting all our achievements and opportunities out of us and into some form of structure on paper. It will be immensely helpful to us to be able to have a proper sustainability policy and a set of goals for further development. We often struggle to talk about our sustainable stuff in a really coherent way.”
Laura CrawfordMama Bamboo
Laura Crawford
“It was a pleasure to take part in the workshop, and we immediately had great ideas to takeaway and items to implement. The action plan we subsequently built with Sustainable X will help us really push this agenda in our sector."
James WilsonForm by Hadron
James Wilson
"The Sustainable X process has made the complex simple for us, and we know where to focus now. We were already doing so much, and so many clients have different ways of asking about sustainability.  In the last month we have pulled it all together. We’re now clear on the good things we’re already doing and focused on what else we can do to get better outcomes. Our strategy is clear. We have come further in the last month than in the last 5 years."
Eugene MeehanO’Neill & Brennan
Eugene Meehan
"Sustainable X have helped us to clearly see where we are and to define the steps we need to take to get to where we want to go. The process has been invaluable, and the Sustainable X team have been a joy to work with throughout. Not only are we now better able to explain to others what we are doing, but more importantly we are in a better position to win more of the work that we want to be doing."
Thomas BryansIF_DO
Thomas Bryans
The process with Sustainable X has helped us structure what we are already doing on sustainability and given us a framework to structure and progress our efforts.By understanding and measuring the impacts of our business, we can benchmark our performance and demonstrate our improvements over time to employees, customers, investors and suppliers. Collaboration with our stakeholders is key to us making increasingly positive impacts, and we would recommend Sustainable X to any manufacturer who want to accelerate their sustainability progress.”
Marc CohenHypeTex
Marc Cohen
"Our work with Sustainable X has been invaluable. The approach has saved us a lot of time and really focused our drive to keep improving the sustainability impacts of Big Green smile. We have already made improvements for all our stakeholders, and have action plans to move the dial on all our major impacts.  It has really highlighted how being sustainable is good business."
Ben WigleyBig Green Smile
Ben Wigley
"As a people business, the key drivers to improving in our areas of greatest impact relate to engaging with our employees and clients to help them be more sustainable.  The Sustainable X process was highly engaging, making it easy for us to prioritise actions over the short and longer term; the approach was collaborative rather than prescriptive, with the result that we’re confident we’ll achieve the objectives we’ve identified."
Tim NashAPR Actuarial Solutions
Tim Nash
"The team at Sustainable X demystified our carbon footprint and helped us put a plan together that combined planet & purpose whilst not losing sight of the desire to continue to grow profitability to look after our people and other key stakeholders. With hands on approach they inspired my team, heralded our many successes in this area and worked with us to fill in the gaps to set us up for success  to make a material and positive difference to our impact on environment."
Jason L DancigerHANA Group
Jason L Danciger
"One thing’s certain, when creating a truly sustainable business model, if you can’t measure it, you can’t manage it. To achieve the level of focus required to create lasting change, sustainability is becoming engrained into every aspect of our business. Achieving net zero is a bold ambition and the journey will be long – but we must make a start and thanks to the work completed with SustainableX, our roadmap is clear."
Steven RawdingRichard Irvin
Steven Rawding
The Sustainable X process has been really thought provoking for us. We understand where we are on our sustainability journey and now have a direction of travel is that is tailored to our business. It would have genuinely taken us a year to get where they have got us already. We feel like we are on a FastTrack to improving our impacts working collectively with our customers, employees and community!
Josh FreethArticad
Josh Freeth
"Working with Sustainable X was engaging and valuable! They enabled us to focus on our big impact areas and helped us develop strong strategies with targets and metrics to track our progress. Their down to earth and easy communication style was refreshing, and what we valued most was the constructive and collaborative approach they take. For anyone looking to start or accelerate their ESG impact improvement, we would definitely recommend working with Sustainable X."
Charlie MichaelsDF Capital
Charlie Michaels
"Sustainable X have taken my hand and guided me through this very unknown, sometimes scary, dark road called Sustainability, towards the light! You have helped us understand what ESG involves and helped lay out a roadmap for us to follow. Breaking down and explaining the terminology in layman terms. Thank you for all your support."
Mishel HathiramSigma
Mishel Hathiram
"One of my favourite moments of the year was working with Sustainable X on our ESG strategy. R Capital has always been committed to staff, customers and communities effected by investments so it has been really great to formalise our goals and clarify exactly what we are going to do and when we are going to do it by. It so important to me to leave this world in a better state than we found it."
R Capital
"Sustainable X are phenomenal to work with, taking a challenging subject that is sustainability and making it very accessible. They are generous with their time and add value with every interaction you have with them. I can’t recommend them highly enough."
Edward RolandsonRO Group
Edward Rolandson
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