About Griet Deca
Chief Happiness | Author | Keynote speaker | Trainer | Consultant
Griet Deca is Chief Happiness & co-founder of Tryangle and one of Belgium’s leading voices on happiness at work, well-being and people-centred organisational culture.
As a keynote speaker, trainer, consultant and stress and burnout coach, she inspires and guides organisations to view well-being not as an isolated HR initiative, but as a strategic lever for engagement, collaboration and performance.
Her vision: when people feel good at work, teams, organisations and results thrive too.
Happiness at work & well-being • Organisational culture • Inspirational leadership • Psychological safety • Stress, resilience & motivation • Behavioural change • Team dynamics
Credit: Rafael Balrak
Credit: Rafael Balrak
Griet combines scientific insights from positive psychology, behavioural science and organisational development with more than twenty years of practical experience. She translates complex topics such as stress, motivation, leadership and culture into clear insights, relatable real-life examples and immediately applicable tools.
In 2017, she co-founded Tryangle Happiness & Well-Being at Work with Kim Hilgert, driven by the ambition to help organisations take a different perspective on workplace well-being. Today, Tryangle has become a trusted partner to numerous companies across a wide range of sectors looking to embed well-being sustainably. In March 2026, Tryangle was also honoured with the **HR Excellence Award** for Best Employee Experience & Engagement Firm.
Griet is the author of **Van welvaart naar werkgeluk**, co-author of **Werken aan werkgeluk**, co-initiator of the Belgian **Week of Happiness at Work**, and was named **NN Happiness Personality of the Year** in 2019. Through books, podcasts, opinion pieces, webinars and keynotes, she actively contributes to the public conversation on well-being and happiness at work.
Griet Deca loves to invite her audience to actively participate and prefers working with exercises, storytelling and thought-provoking one-liners that challenge people to reflect. With her enthusiastic and energetic style, compelling storytelling and a generous dose of humour, Griet knows how to connect with people and inspire them to take action.
2015 – Stress and burnout coach (HRD Academy)
2018 – Happiness at Work Expert / Leading with Happiness (Happy Office)
2018 – Happiness Coach (Leo Bormans)
2019 – Public Speaking (Truus Druyts)
2020 – Chief Happiness Officer (Woohoo Inc)
2023 – Chief Well-being Officer (World Happiness Foundation)
