Our world of work is in transition because of rapid economic, technological, demographic, and socio-cultural changes such as globalization, digitalization, diversity, and empowerment. Arguably, this affects employees because it leads towards a ‘psychologization’ of work. This means that in addition to their specific job skills employees also need to be energetic, enthusiastic, focused, and motivated; in short, they should be ‘engaged’. Therefore, it does not come as a surprise that today’s companies focus on employee engagement rather than on mere job satisfaction or occupational health. This meshes with positive psychology, which is about optimal human functioning instead of fixing what is broken. Since the turn of the century occupational health psychology boasts a growing body of knowledge about work engagement. In this invited address the concept of work engagement is discussed, also in relation to neighboring concepts such as workaholism and job satisfaction, and a state-of-the art overview is presented of recent research findings on the topic. Attention is given to interventions to promote work engagement, both at the individual as well as the organizational level. The address closes with a cautionary note, pointing to the potential dangers of a one-sided focus on work engagement in organizations.