Flagship helps organisations turn fragmented sustainability efforts into better decisions, stronger resilience and lasting business capability.
Through senior expertise, proprietary technology and continuous learning, we give your organisation what it needs to manage change.
Trusted by leading organisations across Europe
50+leading organisations supported
10+years of experience
B Corp Certified
EcoVadis Training Partner
Complex challenges. One trusted partner.
Sustainability does not belong to a single department. It shapes strategy, finance, operations, procurement, legal, communications and investor relations.
Everything you need to move sustainability forward.
Sustainability isn't a single project. It's an ongoing business capability.
Some organisations need strategic guidance.
Senior Expertise
Powered by our professional team with core values
Every project is led by senior consultants who combine sustainability expertise with practical business experience.
We work directly with leadership teams and internal specialists to solve complex challenges, make informed decisions and turn regulatory expectations into practical action.
The Flagship Platform is the technology behind our consulting.
Developed through real client projects, it simplifies sustainability reporting, carbon-footprint calculation, supplier assessment and collaboration across organisations and corporate groups.
Many need to build the internal knowledge to keep progressing long after a project is complete.
Continuous Learning
Powered by the Flagship Academy.
Knowledge shouldn't disappear when a project ends. The Flagship Academy helps your organisation stay capable as sustainability continues to evolve.
Through expert sessions, practical guidance, proven methodologies and accessible tools, your people can build knowledge, respond to change and apply sustainability confidently in their everyday work.
That's why Flagship brings together senior expertise, proprietary technology and continuous learning into one connected ecosystem—supporting your organisation from strategy to implementation and beyond.
Trusted by organisations that expect more.
Our clients don't come to us for reports. They come to us for better business outcomes.
Whether supporting investment decisions, preparing for new regulations, improving sustainability data or building long-term capability, we help organisations turn sustainability into practical business value.
17
Portfolio Companies
A unified approach to ESG and carbon management across an entire investment portfolio.
What we deliver matters. How we work matters just as much.
We believe sustainability creates the greatest value when it becomes part of better business decisions.
The result isn't just successful projects. It's long-term partnerships built on trust.
95%+
Client satisfaction
80%+
Revenue from long-term clients
95%+
Professionalism & integrity
“
After years of advising organisations, I realised the biggest challenge wasn't a lack of ambition—it was a lack of practical systems that made sustainability easier to manage.”
Sandra FelthamFounder & CEO | President, Business Leaders Forum
Let's build what's next.
Whether you're preparing for new regulation, strengthening your sustainability strategy or building internal capability, we'd love to hear what you're working on.
Let's start with a conversation about your business - and explore how Flagship can help you move forward.