Implicit knowledge is less about facts and more about processes that can usually only be conveyed through demonstration and observation. Implicit knowledge grows from experience and is often unconsciously present in each individual. It cannot be codified or transferred through handover protocols, emails, wikis, or intranets. This is a distinctive feature that makes individual employees so valuable to companies. Ultimately, this experiential knowledge has a decisive impact on the development of success-critical competencies within a company. But how can a company preserve implicit knowledge when an employee leaves? Michael Jantzen clarifies both the barriers and the prerequisites for preserving implicit knowledge. He also describes methods and tools for this process from literature and practice.