Career preparation courses or support for higher education students have been strengthened, following some recommendations of international quality assurance standards. This paper presents feedback about a method implementation of collaborative learning practices on career guidance at a French graduate engineering school. The co-orientation© method relies upon groups of students applying simple and original pedagogical input, paced over time. The aim is to provide students with a proven method to facilitate decision-making for future professional mobility, throughout careers that will be subject to the vagaries of a volatile, uncertain, complex and ambiguous international markets. The method approaches career preparation through positive psychology that promotes self-fulfilment and self-actualisation. It adapts co-development facilitation techniques to ensure neutrality and empathy, feedback seeking, as well as a peer-learning pedagogy derived from cognitive psychology. The course is structured in six capsule sessions of two hours each and presented in the paper with learning outcomes. The method can thus be quickly integrated as a ready-to-go toolkit in career training courses, to allow any university to implement it more easily and autonomously.