The book "Identities at Work" offers a comprehensive analysis of identity formation processes in the workplace within the context of modern working conditions and labor market flexibility. It brings together international theories and empirical research from various disciplines, including sociology, psychology, organizational management, and vocational education and training. The contributions in this anthology illuminate the interactions between competence development, human resource management, and career orientation, as well as their impact on employee engagement. In an era dominated by globalization and rapidly changing work realities, an interdisciplinary approach is deemed necessary to better understand and analyze the demands of the international labor market. This work is aimed at researchers and decision-makers in the fields of competence development and organizational management, providing valuable insights into the challenges and opportunities of the modern workplace.