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The Sixsess Consultancy

We Help You Fix Business Problems You Can’t Afford to Ignore

Services

Subscription and Value Based Management & Business Consultancy – For Business Leaders Who Demand Value and Results

High-impact strategic initiatives delivering significant long-term stakeholder value.

Fixed monthly subscription option.

Transparent pricing.  

Working where frameworks and AI alone cannot, providing judgement that drives real-world results.

Call Us Now: 023 8212 1891 (UK)

Our clients can engage us on a subscription basis, with transparent fixed pricing and priority access. 
Subscription covers consultancy provided directly by the Principal Consultant.
Services from Strategic Partners, if engaged, are billed separately at agreed rates.
For select large-scale initiatives, we also offer a value-based model, where fees are linked to agreed deliverables.
CMI Chartered Manager logo
Kotter Advanced Change Certification

Our Strategic Partners

The Sixsess Consultancy helps business leaders solve the problems they cannot afford to ignore – with clarity, conviction, and results that endure.

Led by Barry Eustance and supported by a trusted network of Strategic Partners, we provide frictionless access to world-class consultancy – combining experience, judgement, and proven impact to create lasting stakeholder value.

We are committed to the highest professional standards, adhering to the Chartered Management Institute’s Code of Conduct & Practice.

Meet our partners

Our Principle Consultant

Barry Eustance CMgr MCMI, The Sixsess Consultancy’s Principal Consultant (and former airline captain), has provided his expertise to organisations such as BBC News, Bloomberg Global and the Long-Term Strategy Conference.

BBC News Interview

Barry's hands-on operational perspective on what may have occurred during the Singapore Airlines flight that entered severe turbulence.
A murmuration - birds working in tandem toward a single goal

Bloomberg Global

Barry contributed to the article "Airbus Is Soaring at Boeing's Expense"

Key Note Speaker

Barry presented at the 2024 Long Term Strategy Conference on the subject of Game Changing Leadership.

Learn more about Change & Transformation

Business change takes many forms, from sudden, unexpected disruptions to planned, revolutionary transformations.

Some changes are driven by external factors like market shifts or economic crises, forcing businesses to quickly adapt or risk failure. In contrast, other changes stem from internal decisions aimed at growth, such as adopting new technologies or overhauling operational models.

Successful business strategy involves not just responding to immediate needs but anticipating long-term challenges, aligning leadership, and building resilience within the organisation to navigate both incremental adjustments and sweeping revolutions.

Adaptability is key in any scenario.

Businesses may lack the expertise to effectively manage complex changes, resulting in inefficiencies, delays, and higher costs.

Leadership might struggle with aligning teams or managing resistance, leading to internal friction and poor adoption of new strategies.

Furthermore, without a clear roadmap, companies can lose sight of long-term goals, making decisions based on immediate pressures rather than future success.

Finally, failing to identify potential risks can often lead to missed opportunities or serious operational disruptions.

Effective, well structured, people-centric change programs are essential for any business looking to evolve and stay competitive.

Change involves adjusting strategies, systems, or operations to meet current demands, while transformation goes deeper, reshaping the entire business model or culture to drive long-term success.

Whether it’s adopting new technologies, restructuring teams, or shifting market focus, these initiatives enable organisations to thrive in dynamic environments and respond effectively to challenges and opportunities.

Engaging The Sixsess consultancy will significantly enhance your outcomes by providing expert guidance bespoke to your business.

We bring proven methodologies and deep industry insights, allowing you to navigate complex changes more efficiently.

We help align leadership, manage resistance, and maintain focus on long-term objectives.

By identifying risks, creating strategic roadmaps, and fostering a culture of adaptability, working with The Sixsess Consultancy  ensures smoother transitions and sustainable results.

Ultimately, we enable you to continuously seize opportunity from the changing marketplace and mitigate challenges with confidence, maximising the impact of your change initiatives

Any organisation facing rapid growth, market shifts, or operational inefficiencies can benefit from change and transformation services.

From start-ups looking to scale, to established companies needing to modernise or pivot, this service is critical for businesses aiming to stay ahead in a competitive landscape.

Leaders seeking to optimise performance, future-proof their operations, or guide their teams through large-scale change will find invaluable support and expertise in these services.

Want to know more? Call 023 821 21891 or use the form below.

Business Training Courses

We run a number of business training courses including on People-Centric Change Management and Business Strategy.  Empower your teams to lead change effectively with our expert-led training events.

Our expert-led training is designed to build the skills and strategies needed for seamless transitions, our sessions are tailored to drive lasting impact and sustainable growth.

Target Operating Model Course

Discover how a tailored Target Operating Model can transform your organisation’s future.

Business Growth Masterclass

Learn how to solve real-world strategy challenges with AI-powered tools and frameworks.

PEOPLE Change Management and Leadership Framework

Designed to prepare leaders to navigate both internal and external changes, whether planned or imposed.

View our Full Range of Courses

Watch a FREE preview of our Business Growth Masterclass

In this on-demand webinar, Primer for Business Growth Masterclass, strategy experts Barry Eustance and Chris Fox discuss four of the most persistent barriers to business growth, and explain how to overcome them using practical strategy tools.

Access the Webinar

About the sixsess consultancy

Your Business Problems, Solved with Clarity and Confidence

In today’s fast-moving environment, leaders face issues that frameworks, AI, or generic advice cannot solve.

They need experience, judgement, and insight they can trust.

At The Sixsess Consultancy, we work directly with you to turn complexity into clarity and ambition into action.

Through our subscription-based model, you gain frictionless access to senior-level consultancy – focused on delivering measurable results and creating significant long-term value.

Together, we’ll make sure your business isn’t just prepared for change, but positioned to lead it.

Learn about The Sixsess Consultancy

What People Are Saying About The Sixsess Consultancy

I have had the pleasure of working with Barry a couple of times and highly rate his experience, professionalism, and skills particularly in the field of change and transformations. Barry is exceptionally people focused and has a wealth of experience which he can apply and adapt to organizations across the globe. He has the background and skills to work with leadership teams to enable them to address the challenges faced in leading change. Barry also has the experience of working with managers and teams to help them to address the complexity of change and to build their capabilities. His background in the aviation and airline industry mean that he has experienced leading change in complex situations which provides a unique approach to Barry's focus on the people-elements of change.
Julie Hodges
Julie HodgesProfessor - Durham University Business School, Author of People-Centric Organizational Change and other Key References on Change and Transformation
I worked with Barry for many years... in a way he was my personal mentor. His achievements became the stuff of legend. Barry will bring his unique experiences to the benefit of his clients in the future. I would highly recommend any organisation that faces a need for change to contact him immediately.
Mark Atherley
Mark AtherleyFounder Ancieo Research
It’s difficult to quantify outstanding qualities in a leader, but these are a good start when talking about Barry. His boundless enthusiasm for a task is truly infectious, and he knows just how to bring out the best in his colleagues.
Robin Chester
Robin ChesterFlight Simulator Training Manager at Air New Zealand
I've worked with Barry as I develop and continually move forward with ULTIMAR, and his support and input has been extremely valuable. He brings clarity, structure, and a no nonsense mindset to problem solving. His support and advice has not only shaped key decisions but also made our entire process more effective and rewarding. Highly recommended.
Jack Inglis
Jack InglisFounder, ULTIMAR
Barry has been generous in sharing his vast knowledge, innovative tools, and insights, which have been instrumental in helping me plan ahead and navigate the complexities of launching a new venture. It’s been a true pleasure interacting with him, and I’ve gained immense value from our engagements. I highly recommend you engage with Barry if you or your organisation need trusted advisory to support with upcoming change & transformation.
Paddy Nolan
Paddy NolanLuxury Performance Coach

Why work with us

Our Industry Leading Experience & Expertise

We are industry accredited:

  • Kotter Advanced Change Leader Certified
  • Chartered by the Chartered Management Institute (CMgr MCMI)
  • CMI Qualified in Professional Consulting

Decades of hands-on leadership and global operating experience.



A track-record of negotiating at the highest level, and delivering extremely high value results.


We are frequent live commentators for global broadcast and news media, including the BBC and Bloomberg, who value the specialist expertise we provide for their audiences.

Our Commitment to you

We build long-term relationships based upon trust, communication, proven success and bespoke delivery. We’re here to provide you with the answers you need to succeed.

We don’t believe in “one size fits all”; every client requirement is different so we provide truly bespoke packages.

We have a team of world class strategic partners who work with us to deliver outstanding value to you.

We keep our lines of communications clear, accessible and short.



Our commitment to you extends beyond the assignment



Please see our About page for details of our zero-fee client evaluation and our fixed-priced contract fees.

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