About us

Treeka is a new form of organisational consultancy helping businesses thrive in the growing complexity of the 21st Century.

Founded by Chris Hardy, Thomas Arta and Tom Greenwood, Treeka delivers both human and organisational growth.

Chris Hardy

Chris is busy working out if there’s such a thing as a ‘Cultural Architect’ as that’s what he feels his job is. He’s team coach at Wholegrain Digital and has been working internationally across the coaching industry for 12 years developing a unique approach to individual, team and organisational consultancy.


Thomas Arta

Thomas is a leadership coach and facilitator combining transformative work with a background in mindfulness and developmental psychology. He’s facilitated group processes across year-long time spans and loves nothing more than powerful and meaningful spaces of collective learning and growth.


Tom Greenwood

Tom is the co-founder of the digital agency Wholegrain Digital, with 14 years at the pioneering edge of sustainable business. He’s author of the book, Sustainable Web Design, and is sought out globally for his perspective on leadership, sustainability and tech industry trends.


Melissa Abecassis

Melissa’s work is rooted in asking questions like: What makes us feel alive? And how do we live and work in congruence to that, with kindness and compassion? She has been a coach and therapist for the last 10 years predominantly working in mental health, in conflict zones as a mediator (Israel & Palestine), and within the social innovation sector supporting collaboration within consortia.


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References and further reading

Academic articles

The leadership of emergence

The role of leadership in emergent, self-organisation

How to evolve in an era of ongoing complexity

Dancing on the threshold of meaning

Conversational podcasts

Why sleep is your superpower. Matthew Walker with Rich Roll

Repurposing capitalism. Daniel Epstein and Amisha Ghadiali

How to become a modern elder. Chip Conley with Rich Roll

Useful books

Deep Work by Cal Newport

Less is More by Jason Hickel

The Koala Who Could by Rachel Bright

Online articles

Neurodiversity in the workplace

Growth mindset v. fixed mindset

Play with a purpose

Pioneering organisations

Wholegrain Digital

The Unreasonable Group

Kinsman Group

Recommended training

Conversations at the growing edge

FIRO foundation programme