This publication is based on the outcomes of a Cedefop study on certification processes and competence requirements supporting the professionalisation of in-company trainers. It also builds on Cedefop's work on the changing roles and professional development of VET teachers and trainers (Cedefop, 2010b; Volmari et al., 2009) and the studies supported by the European Commission (European Commission; Institute of Technology and Education, 2008; European Commission; Buiskool et al., 2010). By presenting competence requirements for trainers in continuing vocational education and training from 19 examples from nine countries, wherever possible with specific reference to trainers in enterprises, the publication offers a snapshot of the situation in the Member States as regards competences and professional development of trainers. It is intended to start a discussion rather than give all the answers. Taking into account that trainers in enterprises are a diverse group, this analysis covers: (1) those who work as freelancers or in institutions for continuing training that deliver training to enterprises and in enterprises; and (2) employees in companies who carry out induction of newcomers and/or provide training to others, full time or part time. The publication addresses education and training decision-makers, professional associations of trainers, employers who look for high quality training in their companies, and trainers themselves. All those who are interested in improving the professional status of trainers in continuing vocational education and training can find useful information and ideas for reflection. This publication draws on and contributes to the work of the thematic working group on the professional development of VET trainers, set up by the European Commission in 2012 and jointly coordinated with Cedefop. The group works to identify best practices and develop guiding principles with respect to changing competences and the profiles of VET trainers to contribute directly to the objectives of the Bruges communique (Council of the EU; European Commission, 2010). List of interviewees is appended. A bibliography and a glossary are included. (Contains 4 boxes and 3 footnotes.)