Thierry Gieseler

Thierry is a trusted leadership expert to executives, experts and thought leaders. Since 2011, he has been helping dozens of emerging and senior leaders to reveal their drive and insights in ways that boost their personal growth, impact and visibility.

“I loved working with Thierry and can highly recommend him – he has this ability to dig into details whilst seeing the big picture. Thierry gives constructive feedback and challenged me where needed so that I could move my talk to the next level.”

Prof. Dr. Julia Milner,
Professor of Leadership, TEDx speaker & YouTuber

“I recommend working with Thierry if you want to get your conviction across in a way that transforms your audience.”

Eric Vanbrusselen, Director Business Development Life at AG Insurance

“If you seek to build trust, if you want to embody your role at a higher level, I highly recommend that you work with Thierry.”

Bart Vanden Bogaert, Head of Distribution Belgium, BNP Paribas Asset Management

How to work with Thierry?

Leadership development coaching

The coaching on Expressing Leadership helps newly appointed executives and experts embody and stand for their new role. They show up mature and prepared in boardrooms, team meetings, and one-on-ones.

The programme enhances their vision and expands their awareness and voice in ways that move the conversations and the business forward.

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This resource will help you discover a workable path to grow your leadership. This will help executives and experts clarify the challenges, root problem, typical mistakes, solutions and real value of better expressing their leadership.

A pragmatic perspective on leadership

Thierry believes strongly in the idea that conversations are defining moments. They create meaning and shape the future. Therefore, leadership is revealed in speaking.

How we show up and speak up has the magic power to change the conversation, build trust, engage others in a higher purpose. Self-awareness, sensing others, preparation routines and speaking practice are the foundations to better thinking and better leadership. It changes how people experience their presence and conviction. It changes how they grow their perspective and career.

Thierry holds a master degree in psychology. Prior to building his practice, he gained 10 years of management experience in IT and operations in international companies in Brussels.

Stay in touch!


Square de Meeüs, 35
1000 Brussels, Belgium

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