• Daniel Schall, CEO & Co-Founder

    With her clear and inspiring manner, Toni from YellowBox has helped define what "accountability" means to each of us at Black Semiconductor. She added value to our journey to grow the business by asking some very relevant questions, then designing and delivering an interactive values workshop for the whole company. I highly recommend working with Toni and we look forward to our continued collaboration! ~ December 24

  • Dr Patrick Grossmann, CEO & Co-Founder

    Toni was instrumental in our growth at Invitris by overhauling our entire employee lifecycle. Her coaching for me and our team is invaluable; her approaches are deeply thoughtful. Most notably, she developed and delivered a cultural transformation program that fostered a more daring, connected, and disciplined culture through focused training and process improvements. I highly recommend Toni to any startup looking to strengthen its team and build a strong, fun, impactful, and lasting culture! ~ November 24

  • Anna Rahikainen, Head of ESG

    With Toni as change lead, we achieved the results we sought at The European Pizza Company and gained transferable insights to apply in the management of our company. Working together with Toni at YellowBox was a great pleasure, and she proactively offered the optimal level of support and advice in the times that we needed them. ~ July 24

  • Marion Ranchet, Founder

    One of the hardest steps to climb as an entrepreneur is hiring your 1st team member. Suddenly, it’s not just you in the business. Toni made this transition go so smoothly for me. I was able to rely on her wealth of knowledge and people skills to get things done in record-time. I hope my business will continue to grow as it means I’ll get to work with Toni again. I cannot recommend her enough. ~ June 24

  • Florian Brunsting, GTM Director & Founder

    I can attest that Toni is among the finest professionals I've encountered in my career. She provided invaluable people guidance through every type of change we faced at Getir: scaling for hypergrowth, integrating an acquired competitor, and downsizing!

    I am confident that her exceptional skills, adaptability, and unwavering commitment to excellence will make her and YellowBox an invaluable asset to any organization fortunate enough to collaborate with her. ~ 2023

  • Selin Barlin, Chief Legal & People Officer

    Toni is one of the best people leaders I have worked with. She is one of those rare talents who truly understands the business and can guide the leadership towards success or in the most terrible times. While doing that due to her excellent communication skills and ideas, she enables the leadership to deliver the message in the best possible way. ~ 2023

  • Mira van Houwelingen, Chief Marketing Officer

    Toni is one of the most passionate, dedicated and best professionaIs I know in her field. Her natural way of organizing, structuring and ‘getting sh*t done’ is unlike any I have seen before in my career. And besides that she is a fun human too! Her sense of humor brings a touch of lightness in her role, which makes it extra fun to work with her. ~ 2023

  • Sam O'Brien, Managing Director

    I worked with Toni across a period of MAJOR change at JDE. She made a huge impact across a range of topics - systems implementations, culture and value development, and a critical crisis mitigation. Her ability to deliver this whilst maintaining strong personal relationships, is impressive. ~ 2022

  • Matt Turnbull, Director

    I have been lucky to work with some pretty amazing people , but not many of them can bring the same passion, creativity. commitment and therefore difference as Toni. She really gets what makes businesses successful from both a business acumen and people agility point of view, that is rare in my experience. Above all this, she is great fun to work with! ~ 2022

  • Philippe Schaillee, CEO

    Toni was key in building our high-performing culture at JDE. Besides her tireless positive energy, she impressed with her business sense ensuring a people strategy fully supportive of the overall business strategy. When confronted with the Covid pandemic’s impact on our business, she supported the people implications of a temporary shutdown of the business and eventually restructuring decisions we had to take. I can only speak highly of Toni. ~ 2021