We built Expanding Circles because we wanted to help. That is really all this is.
A psychologist and a sports scientist who believe that living and working well is possible for everyone. You just need the understanding and the tools to make it happen.
OUR STORY
We founded Expanding Circles because we shared a belief. Most people are navigating life without ever having been given clear, accurate information about how they actually work. We built this to change that.
OUR MISSION
We believe people deserve clear, honest, useful information about how to be a person in a body.
Not watered down. Not buried in jargon. Real information, clearly explained, with practical tools people can use straight away.
When people understand how their nervous system works — how stress builds, how the body holds it, how patterns form and shift — something changes. Confusion becomes clarity. Overwhelm becomes something you can actually work with.
And it does not stop with the individual. When people feel better in themselves, they show up differently for their families, their teams, and their communities.
That is how care spreads. Circle by circle.
OUR VISION
A world where living and working well is not a privilege. Where quality education about the mind and body is available to everyone who needs it. Where people have the understanding and the tools to get unstuck, move forward, and feel genuinely good in their lives.
That is what we are building. One programme, one workshop, one person at a time.
Meet the Team
KATHERINE DENNIS
Psychologist · Neuropsychologist · Educator · Speaker
Katherine has been working in private practice since 2015 and running workshops and public speaking since 2018. Trained across Latin America and Europe, she brings clinical psychology, neuropsychology, and systems thinking together in a way that is rigorous, warm, and completely accessible.
She helps people and organisations understand stress, behaviour, and the nervous system — clearly and practically. She is passionate about this work and genuinely believes that when people understand how they work, everything becomes more possible.
SILLSE GIESEN
Sports and Training Scientist · Coach · Co-founder of Ignite Fit
Sillse is a former professional downhill slalom skier and a semi-profenssional field hockey player for the Netherlands. After her athletic career she became a sports and training scientist, moved to Berlin, and opened Ignite Fit.
Her coaching is calm, precise, and personal. She pays close attention to how someone is on a given day and builds from there. She believes movement is one of the most direct ways to learn about yourself.
WANT SOMETHING MORE INDIVIDUAL?
Both Katherine and Sillse work with individual clients through their own practices. If you are looking for one-to-one therapy with Katherine or personal training with Sillse, you can book directly through their individual sites — or get in touch below and we will point you in the right direction.