Size Consens AG — JED - Zürcherstrasse 39 Firmensitz: 8955 Oetwil an der Limmat, 8952 Schlieren, Switzerland

Zehra's practical experience has significantly expanded my existing knowledge in the field of Agile Leadership. Her realistic insights not only provided new perspectives but also clearly highlighted common misconceptions in practice. An absolutely recommendable company – authentic, values-driven, and generous in sharing time and knowledge.

Fatiha Jusufi

The seminar not only provided us with a technically sound introduction to the topic of self-organization, but also helped us critically examine our existing structures. Zehra Sirin impressed us with her clarity, experience, and openness to our specific challenges. The combination of theoretical input, practical tools for our challenges, and the opportunity to work directly on our own examples was particularly helpful. The templates provided are a real added value for implementation in everyday life. The results report was also supplemented with further practical examples, which reinforced the sustainability of what we learned. Highly recommended – well-thought-out, empathetic, and practice-oriented. Thank you very much.

Martina Merkle

With Size Consens, we implemented the development, optimization, and preparation of our integrated management systems according to ISO 9001 (quality) and ISO 45001 (occupational health and safety) in a demanding regulatory environment. From the outset, Size Consens impressed us with its structured and efficient approach: Every meeting was well-prepared, with helpful examples and templates, and clear communication of the process. Zehra Sirin's planning and implementation are particularly impressive. She challenges and supports our team both professionally and methodically, enabling everyone to fully embrace the standards. She successfully demonstrated the added value of an integrated management system to the management team, allowing us to take our efficiency to a new level. The collaboration is consistently honest, solution-oriented, and offers fair value for money – ideal for companies that want to achieve a lot in a short amount of time. Highly recommended – professional, understandable, and effective, all the way to successful certification!

Devran Bal

Zehra Sirin impressed with her inspiring keynote address at the Swiss Coaching Day 2025. Her vivid description of the merger of two very different organizations provided valuable insights into change processes. The SCA extends its sincere thanks for this powerful contribution!

Nadia Abdelli

Zehra, I thank you sincerely for your open ear, which not only hears but also listens. I had the pleasure of meeting you on the phone when I was in a bit of a professional dilemma. From the very beginning, I sensed your empathetic, clear approach, and extensive knowledge of coaching and individual development. The fact that you even took more time than you had available for me underscores your professional work and your personality even more. This certainly won't be the last time I'm grateful for your competent input. I was able to pause and work on some of your inspirations and "mindset shifts" in that short time! Sincerely!

Edita Demolli

- We have enjoyed a long-standing and uncomplicated collaboration with Size Consens. Zehra Sirin supports us with her professional experience, reliability, and practical approach – it's reassuring to know that we can always rely on Size Consens for a dependable external perspective. - One particularly successful project was the training and mentoring of our new Quality Manager, where optimizations were always discussed and implemented with our company's needs in mind. - We greatly appreciate the company-specific seminar content from Size Consens AG, tailored to our key topics and at a relevant level, always delivered with a touch of humor and warmth. - In the intensive leadership seminar on Agile Transformation, our participants were provided with a solid foundation and introduction to the agile working world over two days. The methods and frameworks presented gave us a good understanding of the success factors, working methods, and frameworks of agile organizations.

Guido Brüggemann