The psychology of sustainability claims for a new kind of organization that promotes employee well-being as well as the search firm's performance. In sustainable and healthy organizations, tasks are characterized by their significance, variety, autonomy, and feedback from the job. This way of organizing employees' activities motivates them and can affect their well-being. However, due to a series of age-related physical and cognitive changes, older workers must constantly adapt to task demands to continue working and maintain their productivity. This research explores the moderating role of selection, optimization, and compensation strategies in the relationship between task characteristics (significance, variety, autonomy, and feedback from the job) on the one hand, and job satisfaction and organizational citizenship behaviors on the other. This study was carried out using a lagged design over a three-month interval. Participants were 183 Spanish workers aged between 45-55 years who completed two questionnaires (Time 1 and Time 2). The results support the moderating role of the optimization and compensation in the relationship between task characteristics and employee well-being. Elective selection and loss-based selection strategies do not moderate the relationship. These findings underscore that people who are actively involved in optimization and compensation strategies can age successfully at work. The implications of this study to improve the orientation practices of older workers are discussed.