This book is the product of a series of reflections by career counseling and guidance specialists on a question central to society: "How can career and life design interventions contribute to fair and sustainable development and to the implementation of decent work all over the world? ". This question was formulated by Professor J. Guichard, the director of the UNESCO Chair in Lifelong Guidance and counseling at the University of Wroclaw, Poland. The researchers involved in this Chair’s activities proposed answers which form the chapters of this book. These reflections emphasize the need to focus on the study and implementation of certain central psychological processes which can enable individuals to face the main challenges of our society. The contributions also propose new avenues of intervention for career counseling and guidance. The entire book is the bedrock of a program of research and interventions to be implemented in order that the field of career counseling and guidance plays a key role for individuals who must design their lives in a rapidly changing, and ever more complex context. This book is therefore a major scientific contribution and marks a turning point for researchers and practitioners in career counseling and guidance, and for all professionals who support the self-construction of individuals in the 21st century.