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Some leaders carry the weight alone. Others build a team that shares it.


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Leadership Coaching

I help senior leaders tackle the interpersonal challenges that come with the top job. Together, we transform the relationships that matter most to them.

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Team Training

Too much reliance on senior leaders slows business and shifts focus from customers. TES training helps your people solve problems independently, collaborate effectively and fully own their responsibilities.

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Organisational Culture Development

Culture eats strategy for lunch. But do you know what culture your organisation really has, and what is shaping it?

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News and Views

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How Inkomoko is building a culture that scales

Inkomoko has grown from a small Rwandan social enterprise into a team of more than 600 people serving over 100,000 entrepreneurs across five countries. The Financial Times ranked it the 8th fastest-growing company in Africa. In this case study, CEO Julienne Oyler explains why culture sits at the centre of that growth. TES led Inkomoko through the culture transformation programme, from understanding what staff were experiencing to turning the findings into practical change. Read how Inkomoko responded, and what any leader can learn from it.

Read the full case study on Substack


I appreciate the rigor and pragmatism that TES brings to its work. The insights I’ve gained from the TES impact survey and training have enhanced my leadership.

 Fred Bugingo • Managing Director, Real Contractors

My leadership team valued the hands-on leadership training that TES delivered for us. I've seen a sustained improvement in team communication since our sessions with TES.

Photo of Sunday UffiahSunday Uffiah • Managing Director, Oryx Energies Rwanda Limited

You've just read what Rwandan leaders have to say. You too can consult with Christian directly about what it looks like for your team.

Photo of Christian Sellars

Meet Christian

Christian Sellars has spent 30 years leading complex teams, including global leadership roles at MSD and government experience in South Africa. He holds an MBA from the Australian Graduate School of Management and a Master of Commerce (with distinction) from the University of Cape Town, and is accredited by the International Coaching Federation, as well as Human Synergistics International. 

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