In view of the increasing demand for in-service training in Greece, the Aristotle University of Thessaloniki launched English as a Foreign Language (EFL) teacher training courses, offered for the first time by a Greek state university. This paper discusses issues regarding the design and running of the courses as well as briefly presenting trainee feedback and its role in the continuous improvement of the courses. The rationale and the principles adopted in the design of the courses were in line with current approaches to teacher training. In addition, the design of the courses was based on a national survey involving a needs analysis of practising EFL teachers in Greece. The feedback received from the trainees was very positive with regard to the design and organization of the courses, the usefulness of the knowledge acquired and the fulfillment of their expectations.