The Sixsess Consultancy - Who We Are
About Us
The Sixsess Consultancy
The People, Experience and Thinking Behind Executive Decision Acceleration (EDA)
What We Believe
We believe:
Organisations rarely lack intelligence, experience or information.
The greater challenge is creating the conditions in which those capabilities can work effectively together.
We believe:
capable people should be empowered to think, challenge and contribute
information should create understanding, not simply accumulate
strategy should inform decisions rather than become an annual exercise
leadership should create clarity, trust and accountability
decisions should lead to effective execution
organisations should learn from outcomes and adapt
No methodology removes uncertainty and no organisation makes perfect decisions.
The objective is more practical – to create the organisational conditions in which better judgement, better decisions and better execution become more consistent.
That is the thinking behind Executive Decision Acceleration.
The heart of Sixsess
Our Core Values
Build Long Term Relationships
We believe in fostering long-term partnerships built on trust, transparency, and mutual respect. By committing to ethical practices and aligning with your unique goals, we ensure that every relationship thrives, delivering value over time.
Deliver Excellence
Our commitment to excellence drives everything we do. With industry-recognised certifications, continuous professional development, and a focus on bespoke, independent advice; our mission is to provide exceptional performance on every project.
Providing Value
The Sixsess Consultancy is the professional home of Barry Eustance’s work in executive decision-making, judgement under pressure, and organisational clarity. Barry works personally with senior leaders and boards, drawing on a small, trusted network of specialist strategic advisors where appropriate. Engagements are time-bounded, selective, and priced as fixed fees
Get to Know Us Better
Meet Our Team of Experts
As a client, you will also benefit from our world-class network of Strategic Partners.
Barry Eustance
Principal Consultant
Biography
Barry Eustance has more than five decades of leadership and decision-making experience across aviation, business and management consulting.
A former long-haul airline captain and senior aviation leader, Barry has worked internationally in high-consequence environments requiring effective judgement, calm decision-making and execution under pressure.
Today, as Principal Consultant of The Sixsess Consultancy, he works with senior leaders on strategy, people-centric change and Executive Decision Acceleration (EDA).
Barry holds the CMI Masters-level Diploma in Professional Consulting and is a Kotter Advanced Change Leader and StratNav Grand Master.
Biography
Over 25 years of experience leading major organisations through growth, transformation, and operational challenges at Board and CEO level.
With a background spanning Europe, Asia, Africa, and the Middle East, Remco thrives in dynamic environments where strategic vision, execution excellence, and stakeholder alignment drive sustainable success.
Driving Business Transformation & Growth.
From stabilising state-owned enterprises including airlines to turning around financial performance, Remco specialises in leading complex change programs that restore profitability, improve operational efficiency, and position organisations for long-term success.
Remco Althuis
Board-Level Advisor Transformational Leader, Growth, Strategy & Turnaround Expert
Biography
Remco has over 25 years of experience leading organisations through growth, transformation, and operational challenges at CEO/Board level.
With a background spanning Europe, Asia, Africa, and the Middle East, he thrives in dynamic environments where strategic vision, execution excellence, and stakeholder alignment drive sustainable success.
With deep experience in revenue growth, market expansion, and operational strategy, he supports businesses in making data-driven decisions that enhance efficiency and profitability.
From stabilising Nordic Aviation Group to turning around Air Seychelles, Remco has a proven track record of delivering measurable results.
Gavin Brogan
Data Driven Growth Strategist
Biography
As the Managing Director of Coorie Dug, Gavin leverages 20+ years of experience in digital analytics and marketing to help clients optimise their online presence and achieve their business goals.
Coorie Dug is a digital consultancy that specialises in investigating and improving digital journeys across various channels and platforms.
Gavin’s core competencies include implementing analytics solutions, conducting A/B testing, providing actionable insights, and informing data-driven marketing strategies.
Additional information
He also shares his expertise and insights on his blog, where he discusses topics such as digital intent, purpose, and strategy. Gavin is passionate about enhancing customer experiences and delivering results for both clients and partners.
Sam Carter
Data Analyst & GA4 Technical Specialist
Biography
Sam is joint Managing Director of Coorie-Dug and has over a decade’s experience in digital marketing data, recently as a digital data analysis (last 4 years).
Fluent in end-to-end analytics; from setting up data layers, to building tags in GTM controlled by cookie consent opt-in, through to building dashboards, and interrogating data to find anomalies, opportunities and actionable insights, UA/GA/GTM/PowerBI/Tableau.
Sam has built python scripts that leverage APIs to collect customer data sets, modelled data (intent classification & trend prediction to detect anomalies).
Before starting Royal London Sam worked in the Games industry, and before that she was running PPC at a marketing agency spanning many industries.
Chris Fox
Strategy Consultant
Biography
Chris holds an MBA, a B.Com (Hons) in Information Technology, a B.Com in Accounting & Information Systems awarded by the University of Cape Town.
Chris is an independent business strategy development and execution consultant helping senior leaders to develop and execute evidence-based future-oriented business strategies.
StratNavApp.com
Chris is also the founder of StratNavApp.com, the revolutionary collaborative software solution for business strategy development and execution.
It powers both his own consulting practice and many client organisations, including The SIXSESS CONSULTANCY, enabling us all to deliver higher quality results with more consistency.
Biography
Over 25 years of experience leading major organisations through growth, transformation, and operational challenges at Board and CEO level.
With a background spanning Europe, Asia, Africa, and the Middle East, Remco thrives in dynamic environments where strategic vision, execution excellence, and stakeholder alignment drive sustainable success.
Driving Business Transformation & Growth.
From stabilising state-owned enterprises including airlines to turning around financial performance, Remco specialises in leading complex change programs that restore profitability, improve operational efficiency, and position organisations for long-term success.
Michael Glanville
Executive Coach, Speaker, NED, CEO, LDC. Times Newspaper Top 50. Alumni – The Leadership Trust
Biography
After over 25 years working in business having led some brilliant teams and Boards and having had many successes and of course challenges and therefore lessons learnt along the way, Michael now provides a portfolio of consultancy services tailored to senior leaders and founders who want to develop their business, people, brand, operational performance, efficiency, pace, resilience and profitability.
He promotes his activities as a business development consultancy with a difference.
Michael helps businesses grow by developing their people and as a catalyst for transformative change.
Michael Glanville Executive Coaching programs are designed to empower CEOs, MDs, and board members to become exceptional leaders.
Richard Nanton FRAeS, FloL
Aviation Consultant
Biography
Richard’s extensive experience includes: Thomas Cook Airlines UK – Director Flight Operations & Group Airlines Pilot Management; easyJet – Chief Pilot; Qatar Airways – Vice President Flight Operations Chief Pilot Recruitment; Jet2 – Chief Training Manager.
Captain and TRE on B737, A320, A330, B777, B747-400, ACJ320 NEO.
Founder CarboNetZero Ltd, enhancing efficiency amid regulatory and industrial shifts.
Business coach using Marshall Goldsmith, Global Coaching Group, and Human Synergistics for high performance.
Adrian Stratta
Biography
A veteran, with 30+ years of leadership across corporates, start-ups, SMEs and enterprise sized companies in both public and commercial sectors, Adrian is a transformation, turnaround and (sustainable) growth orientated executive.
He brings expertise in strategic implementation, operational excellence and enabling teams/people to drive impact and results.
Key achievements include enabling Arriva plc to secure their sale, by driving an above target year one £24m efficiency programme; a 4-fold scale-up of a £70m Buy-On-Board service to BA and Virgin airlines, and turning around Air Fayre from a loss to a £1.1m profit.
David Winders BSc (Hons), DTLLS
Business Architect – Principal Target Operating model Course Facilitator
Biography
David specialises in training, consulting, and mentoring in the creation and understanding of Operating Models and Business Architecture, training in business design, and improving business architecture capability in business change teams.
David also provides training in business design and business architecture.
David has delivered in this space for two decades.
He has also been an contributor to core references on business architecture.
Biography
David specialises in training, consulting, and mentoring in the creation and understanding of Operating Models and Business Architecture, training in business design, and improving business architecture capability in business change teams.
David also provides training in business design and business architecture.
David has delivered in this space for two decades.
He has also been an contributor to core references on business architecture.
Biography
David specialises in training, consulting, and mentoring in the creation and understanding of Operating Models and Business Architecture, training in business design, and improving business architecture capability in business change teams.
David also provides training in business design and business architecture.
David has delivered in this space for two decades.
He has also been an contributor to core references on business architecture.
Biography
Over 25 years of experience leading major organisations through growth, transformation, and operational challenges at Board and CEO level.
With a background spanning Europe, Asia, Africa, and the Middle East, Remco thrives in dynamic environments where strategic vision, execution excellence, and stakeholder alignment drive sustainable success.
Driving Business Transformation & Growth.
From stabilising state-owned enterprises including airlines to turning around financial performance, Remco specialises in leading complex change programs that restore profitability, improve operational efficiency, and position organisations for long-term success.
Jean-Mark Youkhana-Ichard
CEO – Uplifting Aviation supporting aviation transactions – $1.7 bln