Team-building is more important than ever. Jens Corssen, Germany's most sought-after coach for personal development and goal achievement, along with his coaching partner Stefan Gröner, demonstrates in their current psychological non-fiction book how a self-developer can become a successful team developer - essential for leaders, team managers, and trainers. As a team developer, a good supervisor not only supports their employees professionally but also acts as a thoughtful relationship manager. They provide employees with guidance and trust, encouraging them to face the challenges of an increasingly unpredictable world with determination and passion. Together with his coaching partner Stefan Gröner, the renowned business coach Jens Corssen has developed innovative team roles based on the philosophy and practice of the self-developer.