Illuminating potential in leaders, teams, and organisations
Lumenise is a boutique organisational development consultancy, grounded in the psychology of Transactional Analysis (TA).
We work in partnership with leadership teams, organisations, and professionals facing complex challenges.
23+
Years in OD
378+
Leadership teams enabled
1850+
Leaders supported
Through organisational development and transactional analysis, we create space to think clearly, work differently, and move forward with purpose.
When things feel complex or stuck
You may not have clear answers yet — but you can sense something isn’t working as it should. It often shows up in ways like these:
For organisations
When your senior leadership team needs help adapting to an uncertain future
When you need to navigate the human side of AI adoption
For professionals
When you want to deepen your professional expertise using Transactional Analysis (TA)
When you want to become a more psychologically aware leader
Meet James
James Longwell is an organisational development consultant working with leaders and organisations when the usual ways of thinking are no longer enough. His work often begins where things feel unclear, pressured, or difficult to move forward.
He brings a calm, thoughtful approach to complex situations — helping people step back, reflect, and understand what is really happening.
Rather than offering quick answers, he works alongside clients to find a more effective way forward.
The work is collaborative — it is done together, in partnership with clients.
James has worked across global organisations, including Google, and across industries such as technology, media, and FMCG. He has supported senior leaders through large-scale organisational change and complex transformation.
His work is informed by the psychology of transactional analysis, which he has been practicing since 2013. He has a particular interest in how it intersects with AI in real organisational contexts.
James' work is grounded in a strong ethical and practical understanding of how organisations function.
Organisational development consultant services
This work supports organisations and professionals dealing with situations where progress is difficult and something needs to shift.
For organisations
For senior leaders in multinational organisations, startups, and small and medium-sized enterprises (SMEs) who are navigating change and looking for a trusted way forward.
Services: Organisational Development Organisational Transformation Culture AI Adoption Executive Team Coaching
For professionals
For professionals who want to improve how they work — including managers, HR professionals, consultants, and coaches.
Services: TA Training, TA Supervision
What is Transactional Analysis (TA)?
Transactional Analysis (TA) is a humanistic and systemic psychology developed by Eric Berne in California in the 1950s and 1960s. Since then, it has evolved and is now widely used around the world.
Although it began in psychotherapy and counselling, it soon expanded into organisational and educational settings. This is where James first encountered its value.
In organisations, TA is used to explore leadership, teams, and systems, as well as the human dynamics that shape how they function.
How Transactional Analysis understands people, life, and change
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This is one of the most fundamental assumptions.
You, I, and others all have value and dignity. I accept myself, I accept you, and I accept others. No one is above or below another.
This remains true regardless of how we define ourselves — including gender, ability, race, sexuality, neurodiversity, or any other aspect of identity.
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People think in different ways and at different levels. All ways of thinking are valid. This is part of how people make sense of their experience.
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People have the capacity to shape their lives through the decisions they make. These decisions are not fixed and can be changed over time.
The purpose of change is to increase autonomy. This happens by moving beyond patterns that may limit how we think or act.
Training and supervision in Transactional Analysis
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