This specialized book presents flexible work models based on the results of a broadly supported study that can lead to continued employment for individuals over 50 years old until retirement age and beyond. HR professionals, managers, and interested employees will learn strategies to effectively counteract the shortage of skilled workers, as well as contribute to the health, motivation, and improved work capacity of employees. A systemic model illustrates the influencing factors of sustainably good work, a trend chapter outlines future challenges, and specific flexibility models along with case studies facilitate the practical implementation of the findings.