Hazel Gruenewald is Professor of Organisational Behaviour at NXT Faculty, Reutlingen University, Germany, and brings extensive industry experience in global HR, leadership development, and workforce transformation to her academic role. She collaborates closely with businesses and international academic institutions on real-world projects, delivers executive seminars and keynote speeches, and provides advisory and training services.
Her research and teaching are firmly grounded in practical, application-oriented areas, including sustainable HR management, change management, leadership, negotiations, diversity, and global teamwork.

Maren Mueller is Professor of Business Administration at the Baden-Württemberg Cooperative State University (DHBW) Ravensburg, Germany, and a recognized expert in reskilling, leadership, and high-performance development. For more than a decade, she has bridged academic excellence and business practice, translating cutting-edge research into actionable solutions for organizations and leaders. Her work is informed by extensive international business experience and close collaboration with elite athletes, top executives, and high-performing teams. As a sought-after keynote speaker, executive seminar facilitator, and strategic advisor, she supports organizations in developing high-performance cultures, strengthening leadership capabilities, and successfully navigating transformation. Combining scientific rigor with practical relevance, she equips leaders and organizations with the mindset, capabilities, and strategies needed to thrive in an increasingly complex and dynamic world.