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A selection of satisfied customers

Trusted by leading organisations – and voiced by the people who drive them. Discover what our clients say about working with us.

Rene Behr

CHRO, IWC

„Working with Jester Advisory AG has helped us understand resilience not just as an individual issue, but as a strategic lever for our organization. We especially appreciated the unique combination of high professionalism and genuine humanity, which made complex psychological content objective and tangible. From top management to the everyday work of our employees, the response to the Energize sessions has been overwhelmingly positive, and we are already seeing initial changes in how we deal with stress, energy, and leadership.​"

Stephan Wetterwald

CEO, Basellandschaftliche Pensionskasse

„Jester's external perspective helped us identify critical blind spots and thus advance our working methods and employee development in a targeted manner. Thanks to this collaboration, we were able to establish a strong feedback culture, which we see as an indispensable part of our culture and a foundation for a successful future.​"

Dominique Jäggi

Director, Hirslanden Klinik im Park

„Jester understood us and identified our problems in no time. They always responded to the unique dynamics of our workshops. They taught us psychological models that we now consider indispensable in our everyday work, and they always managed to challenge us. During and after the workshops, we were treated with great humanity, empathy, and love—which also brought us closer together as a team. Thank you very much!​"

Marco Zanolari

Group CEO, The Living Circle

„Jester has accompanied us on our transformation journey from the very beginning. Their commitment encompasses planning, collaboration, motivation, and implementation. The professional and inspiring approach to teamwork fits well with our ethos, and we appreciate the open and honest exchange. We now have a new, more efficient organizational structure and new corporate values that we cherish and live by. Thank you very much for this remarkable journey!​"

Luca Stäger

CEO, Tertianum Gruppe

“Jester has impressively demonstrated to us that humanity and performance orientation are not contradictory. Their approach combines empathy with clarity, inspiration with discipline, thereby creating precisely the energy that sets an organization in motion. This combination of heart and mind is rare and extremely valuable to us.”

Hanspeter Stricker

CFO, Rahn AG

„The training provided by Jester Advisory for our managers was very exciting and enriching. We identified blind spots in our understanding of leadership and worked on them together. Jester's practical approaches have given us lasting strength for the demands of everyday management.​"

Patrick Bundeli

CEO, Intersport Switzerland

„Jester has made an important contribution to our transformation process over several years. Their focus on cultural change and team development has significantly improved the alignment of our leadership team. Their workshops provide a solid foundation for the effective implementation of our strategy and organizational progress.​"

Christian Späth

Head of Civil Engineering, Implenia

„Jester is much more than just a provider of leadership tools. They guided us through the mission statement process and then helped us to further develop our culture and strategic implementation accordingly.​ Working with Jester has brought us closer together, especially as a management team. I was also impressed by their holistic view of the organization and its sustainable development. It has been an enriching experience for me personally and for my entire team."

Robert Koch

CEO, Zentralklinik Bad Berka (Rhön AG)

„Working with Jester enables us to better understand and play an active role in taking the necessary steps. I find it very valuable to have the outside perspective of a professional who reflects on the organization from both a logical and a human point of view. Working with the Jester team is also a lot of fun—you can feel the energy in the teams and among the managers. Things are moving, and that motivates me greatly as a clinic director!​"

Dr. Joachim Ramming

CEO, MEDICLIN AG

„Since 2022, we have been pursuing the path of transformation and corporate restructuring at MEDICLIN not on our own, but with Jester Advisory at our side. This was never just about concepts on paper, but about mindset in everyday practice, about orientation when things become unclear, and about clarity when decisions are uncomfortable. Together, we developed a new purpose statement and then took the decisive step of consistently translating our values and strategic direction into leadership practice.

Our leaders were supported in truly taking responsibility, gaining confidence in their roles, and carrying this new mindset into their teams. A key building block was the sharpening of clear role profiles, because proactivity, clarity, and accountability are not nice to have qualities, but the foundation of effective collaboration. At a strategic level, Jester Advisory helped us prioritize the right strategic directions and steer them through a binding project portfolio management approach, ensuring that we do not just initiate initiatives, but actually deliver.

In the end, what matters most to us is the continuous, strategic support of our leaders and the development of a resilient organization during a phase that remains characterized by high complexity and profound change."

Friedrich Behle

Geschäftsführender Vorstand der Günther Graf von Hardenberg-Stiftung

"Aware of the profound changes currently taking place and the complexity they entail, we deliberately sought a clear, sharp view from outside. A view that challenges us, provides impetus, and helps us to make an already strong foundation even stronger. With Jester, we have found this form of support. For me, the decisive factor is our shared attitude: people are at the center, honest discussion begins with ourselves, and we can shape our cooperation in such a way that it is sustainable. This is not a short-term course of action, but substantial support in order to align the future of the Graf Hardenberg Group in a targeted and responsible manner."
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