It is a book structured in two parts, which is a contribution to the efforts to develop non-formal apprenticeship systems in developing countries. It is an engineering guide to the design of apprenticeship systems and to the structuring of renewed apprenticeship training schemes integrated into vocational and technical training systems. In the first part, the author reviews the process and structuring elements of an apprenticeship training system integrated into the national vocational and technical training system. In the second part, the author addresses the complex issue of structuring apprenticeship training systems by describing experiences and models that he has already implemented in Senegal and that have enabled young people to be qualified and sustainably inserted into the labor market.The proposed and documented systems are flexible and constitute second chance schools, thus contributing to equal access to a standardized qualification for all. Finally, a set of recommendations are formulated to better respond to the need for competent human resources.