Le Vademecum de l’ingénieur conseil is a French-language professional handbook for consulting engineers and technical advisers. Presented as a compact vade mecum, it focuses on the practical side of engineering consultancy rather than on abstract theory. The book is intended to help practitioners orient themselves within the routines, obligations, and decision points that shape independent or advisory engineering work, including client relations, project organization, professional responsibility, and the administrative framework surrounding technical missions. Its concise format makes it suitable as a field reference for readers who need a clear overview of the profession’s working methods and expectations, particularly in a French-speaking engineering environment. The 184-page paperback edition suggests a portable guide designed for consultation during professional development or everyday practice.