We bring energy and imagination, experience in leadership and change, and proven methods to nurture evolution across complex organisations.

Past clients

AXA / AXA Framlington
Bain Capital
British Standards (bsi)
CDC Group
Deutsche Bank
Herbert Smith Freehills

Jardine Lloyd Thompson
JP Morgan
Manchester Airports
Merrill Lynch
NHS Property
Nomura / Instinet

Rakuten Marketing
Royal Bank of Scotland
Royal Hospital Chelsea
Standard Chartered
Visible Alpha

Quentin Millington Nudge festival 2022

Quentin Millington


Quentin set up Marble Brook because culture – accepted thinking, choices, and behaviours – makes or breaks a company’s ambitions to create value.

Make culture as an asset

Quentin works within FTSE, multinational, and medium-sized businesses to align strategy, leadership, and practice, and so turn culture into a unique asset.

With hands-on expertise in business, management, and complex systems, he stretches companies to find value within the trends that disrupt industries, brands, and careers.

In practice

A skilled facilitator, Quentin challenges executives to explore strategic questions that matter to the company and to themselves. With robust discussion he secures agreement on ways forward.

A critical friend, he builds trust and connects across functions and levels. He shapes dialogue with fresh ideas, helps answer thorny questions, and coaches managers to overcome resistance.

Coalface of leadership

Quentin knows what days are like at the coalface of leadership. As a Chief Operating Officer in banking, he led multidiscipline, client-facing teams of up to 130 people, with budgets over US$100m.

He also ran, across US$1bn businesses of more than 1,000 employees, culture initiatives to increase revenue, enhance service, and cut cost.

Outside the office

His MPhil in Innovation, Strategy and Organisation from Cambridge and MSc in International Management from London allow Quentin to grasp the hidden dynamics of performance.

During his first degree, he moved from Oxford to Asia and learned about culture the hard way. Proficient in Mandarin, Quentin has lived and worked in New York, Hong Kong, and Taipei.

I very much recommend Quentin’s thought leadership and his gift for uncovering new paths to engagement and best practice. He has an amazing way of shaping and framing ideas to enhance clarity of thinking and deliver robust outcomes. Quentin is a trusted authority in his field, and has the depth – of knowledge, perspective, and experience – that comes from helping senior teams and boards make the most of new opportunities.

Kate Bohn
Lloyds Banking Group

From day one Quentin showed a great appetite to really understand the two cultures and business objectives. He brought with him a vast amount of experience and techniques but was very open and flexible to suggestions and ideas to adapt to the way we work. Always probing, always listening and always thinking, Quentin teased out the data we needed, never afraid to ask the difficult questions.

Graeme Jerome-Ball
Director of Global Branding

[Quentin] has been exceptional – a perfect blend of knowledgeable, consultative, inspirational, challenging and the ability to give us all a bit of a push when we need it!

Moira Brown
Chief HR Officer

Quentin draws on his wealth of experience as both a leader and a coach to challenge thinking and reveal a new direction. He has lots of practical advice for improving communication, engaging with stakeholders, and shaping a vision.

Helen Baker

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