Mesut Celebi is the founder of Growthstars, a company dedicated to equipping leaders with tools and strategies to drive lasting employee engagement. With decades of experience working alongside Fortune 500 industry leaders, Mesut has seen firsthand the transformative power of aligning mindsets and behaviors to overcome growth barriers and accomplish mission-critical goals. His approach fosters a culture where openness, growth, and well-being are core values, empowering teams to excel and create a sustainable foundation for success.
""On my first day as Managing Director for Southwest Europe, we launched the leadership Growth Mindset Accelerator. We were entering a major business transformation, and I wanted leaders to start with the right mindset and a shared way of working across Spain, France, and Italy. What followed was not a program, but a fundamental transformation of how we relate to each other, drive change and learn as an organization. RESET became an ongoing rhythm, supported by internal mentors who had gone through earlier Accelerators and now help teams shift mindsets and turn insight into action. It empowers change at speed and builds leadership capability where it matters most."" - Martina Müller, Managing Director at FrieslandCampina (South West Europe) ""Mindset isn't optional-it's critical. We knew old behaviours wouldn't deliver the results we were aiming for. This work pushed me well outside my comfort zone and created a level of vulnerability and psychological safety where real issues could be confronted in the moment. That depth is what makes the difference. This isn't a tick-box program or a new management idea-it's fundamental psychology."" - Will Jones, Managing Director at FrieslandCampina (United Kingdom & Ireland) ""One thing I've learned leading across the Americas is that you can't use a one-size-fits-all approach. The mindset assessments really opened my eyes-they pushed me to stop leading based on my own assumptions and start leading based on where my team actually is. It gave us a clear picture of our individual strengths and a roadmap for how to grow together. Integrating the RESET Leader method has turned into our go-to way to recalibrate and keep everyone moving in the right direction. It's been huge for building clarity and getting things done faster."" - Sumeet Mathur, Managing Director at FrieslandCampina (Americas) ""One of the things we're doing is embedding Growth Mindset principles within the team. We think of it as a platform that encourages talent to share learnings-not just the wins, but also the challenges and different ways of doing things. That helps accelerate learning and allows insights to cascade quickly across our innovation. Partnering with Growthstars has been helpful in strengthening the muscle around taking calculated risks, embracing learning through failure, and creating the culture needed for future success."" - Amir Kazmi, Former Chief Information & Digital Officer at Westrock; Current Chief Tech & Growth Officer at Ralliant ""Our growth ambition was significant-and the targets were demanding. We had a strong, capable leadership team, but speed mattered. We needed to move fast, together. What we were missing was a shared language and clear ways of working that could support that pace. Growthstars gave us exactly that: practical tools, meaningful experiences, and a structured way to begin building the culture we needed to achieve our goals."" - Daryn Edgar, Former CEO of LYTT, a BP Company; Current CEO of Edmonton Global ""My initial skepticism was that Growth Mindset might be another management concept that comes and goes. Instead, it proved to be refreshingly practical. It challenged how we think as leaders and as teams, while allowing us to experiment in small, safe steps before taking bigger leaps. It helped people reconnect with feeling, learning fast, and acting boldly. That combination made the change real."" - Kevin de Wolf, Former President & CFO at FrieslandCampina (Americas); Current Managing Director Doka (USA)