About Us
We are Sewells. We transform businesses from the inside out.
- About Us

Who We Are
For over half a century, we’ve helped transform underperforming businesses into high-achieving organisations.
Partnering with organisations large and small, we’ve been their guide to unlock their true potential. Not through quick fixes or management fads, but by addressing the factors that matter most – how people think, behave, and perform.
The real test of any business transformation isn’t the immediate results – it’s what happens next.
That’s why our partnerships usually span years, not months. Why our clients keep coming back. And why, after five decades, our approach continues to deliver measurable, sustainable results across every sector we work with.
We’ve learned that building high-performing organisations isn’t about imposing change from the outside. It’s about working alongside our clients, understanding their unique challenges, and helping them develop the internal capability to drive their own success.
This hands-on, partnership approach sets us apart. We don’t just advise – we roll up our sleeves and work with you to make change happen.
Our Purpose & Values
Our purpose is simple but powerful:
Our Purpose:
We make a positive, measurable, tangible difference to every individual and organisation we have the privilege to serve
While many businesses might laminate their values and hang them on the wall, we live ours every day. They guide every interaction, decision and intervention we make:
Every member of our team, from leadership to support team, is chosen not just for their expertise, but for their commitment to these principles. It’s why our clients trust us with their most important challenges – and why that trust consistently leads to exceptional results.
What this means in practice:

Our Team
Great business transformation requires more than just great ideas – it needs the right people to make it happen.
Our core team brings together diverse expertise across all our functions. But what truly sets them apart isn’t just their professional capabilities – it’s their commitment to our clients’ success.
Each team member is chosen for their:
- Passion for delivering exceptional client experiences
- Ability to build strong, lasting relationships
- Track record of driving meaningful change
From your first conversation to the final stages of implementation, you’ll work with people who understand your challenges, speak your language, and remain focused on your success.
Our Impact
The true measure of our success is the lasting impact we create for our clients. Here are just a few examples of what that looks like:
- Alcon: Sustained cultural transformation and collaborative success. Revenue Growth (£8m turnover to £28m turnover, EBITDA of 20%), Headcount Growth (from 70 to 230).
- Beldam Crossley: An 18.2% increase in sales and best year ever in terms of performance following the programme
- De Beers: Achieved sustainable performance improvements that set new standards for success, an aligned team with a clear outcomes focused strategic plan
- Pilkington: Customer Survey going from 0* to 3* (Gold Standard), Employee Engagement Scored 81% (up from 75%)
- Verplas: Transformed from a blame culture into a high-performance environment, productivity up by 30%, highest sales (up 32%) and profit ever in it's history (dating back to 1986)

Our proudest achievement is the number of clients who continue to partner with us year after year, treating us as a trusted extension of their leadership team.
Want to see more? Explore our detailed case studies to learn how we’ve helped organisations like yours achieve lasting transformation.
We don’t believe in one-size-fits-all programmes for this kind of work. Instead, we follow a flexible-but-proven process that adapts to your unique challenges:
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This isn’t about quick fixes or temporary changes. It’s about creating lasting transformation that continues to deliver results long after our work together is complete.
Ready to Transform Your Organisation
Every successful transformation starts with a conversation.
Book a free consultation to:
- Discuss your current challenges
- Explore what's holding your business back
- Understand how our approach could work for you
- Get clear on your next steps
Rather learn more first? Explore our case studies to see how we’ve helped organisations like yours achieve lasting transformation.