Employees' expertise and competence are among the important success factors of today's work organizations. This special issue focuses on expertise and excellent performance within work settings, addressing questions such as: How do excellent performers proceed when accomplishing work tasks? Which strategies do they use? Which aspects of knowledge and behaviour are crucial for excellent work performance? How can you identify, select, and train excellent performers? Expertise at Work combines empirical studies and practitioners' approaches to these challenging issues. In addition, open peer commentaries are provided by academics and practitioners from a number of European countries.