Political impetuses for raising the professional status of the careers sector in England have spanned more than a decade, driving an assiduous pursuit for professionalisation linked to the training and upskilling of its workforce. This paper builds on previous work by the authors and explores the necessity, and integration of theory for practice through the delivery of a training programme for adult career advisers to meet the requirements of units from the Qualification Curriculum Framework (QCF) Diploma 6 in Career Guidance and Development. The findings indicate that successful careers pedagogy should accommodate trainers' reflexivity and their theoretical stance(s). The integration of theory and reflection offers a powerful lens through which practice can be developed, supporting career advisers and trainers to engage in reflexive and reflective learning. The paper offers an original insight into the pedagogic approaches utilised and their effectiveness from both career advisers and trainer's perspectives.