Driving Positive Change in Business
Drive positive change and business performance by connecting with a problem-solving professional.
Helping organisations turn complex challenges into measurable results through structured change, effective governance, and a people-first approach.
Meet Denis
Professional Problem Solver
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I’m Denis Collen. A transformation advisor, PMO leader, and professional problem solver who helps organisations deliver meaningful change and lasting results.
With over three decades of experience spanning B2B, B2C, and not-for-profit, working in sectors as diverse as retail, aviation, sustainable energy, and healthcare, my passion lies in making organisations more efficient and effective.
I’ve partnered with FTSE-listed giants and agile SMEs, so no matter where you are on your business journey we can sit down for a virtual coffee and talk strategy.
My career has been dedicated to making a difference, and I’ve been privileged to partner with incredible teams and people, delivering transformative results.
denis@mad4.org
+44 7973 181 507Strategic Problem-Solving
I address various business challenges, from business strategy and team culture to efficiency and cost reduction, flexible working, systems, sustainability, supply chain, and pursuing rapid growth.
My approach involves asking the right questions to drive positive change.
Solving Problems Together
Why Schedule a Virtual Coffee with Denis?

Fresh Perspective
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No matter how well-established your organisation is, an external perspective can illuminate unseen opportunities and challenges. My virtual coffees often lead to breakthrough ideas that drive success.

Efficiency Gains
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Efficiency is the heartbeat of any thriving organisation.
My collaborative discussion can help identify areas where processes can be streamlined, resources can be optimised, and operations can run smoother.

Innovation Spark
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Innovation fuels progress. By talking with me, you open doors to innovative solutions and foster the opportunity for change that can transform your business and give you a competitive edge.

Problem Solving
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Every obstacle is an opportunity in disguise, and through meaningful dialogue, we can collaboratively transform even the most complex challenges into solvable tasks, paving the way for actionable solutions.

Enhanced Strategy
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I can help you see the bigger picture, guiding you towards a deeper understanding of your business landscape, and a virtual coffee can lead us to the development of an effective business strategy.
Success Stories
What Our Partnership Can Achieve
Real-world examples of my success stories:
Operational Efficiency Success
Major retailers faced operational inefficiencies and customer engagement issues in the retail sector.
I led initiatives using Six Sigma Techniques to streamline processes, enhancing store propositions and checkout experiences, and improving communication strategies for change adoption.
Outcomes:
- £500 million savings delivered over three years
- £10 million in labor budget savings in two years
- £34 million in capital investments, delivering £20 million in profit and loss (P&L) benefits
- Delivering £20 million in profit and loss (P&L) benefits, plus £4 million of capital savings
I emphasised the approach to customers and colleagues to achieving operational efficiencies and improving customer engagement in the retail sector.
Testimonials
Here’s What My Customers Had to Say
Driving positive change to businesses in different sectors with my effective approach:
Outco brought Denis in to support the business in understanding and proposing solutions to Governance, Processes and Project Approaches. He left us with a clear plan to increase project profitability and positively influenced our colleagues throughout the engagement.
Andrew Barry
Outco
CEO
Have a question for me?
In the ever-evolving world of business, change is the only constant. It’s not just about surviving; it’s about thriving, adapting, and staying ahead of the curve.
Don’t wait for change to happen; make it happen today. Book a no-obligation call, and let’s start a conversation that could transform your business.


