The intention of this paper consists in presenting the results of a qualitative research performed to a group of English teachers. All of them must be prepared to face the different types of classes, methodologies, students’ ages, and backgrounds. For instance, they should know what, how, and when to teach depending on the context they would be involved in. One of the challenges English teachers face during their practice is English for Specific Purposes training classes. As there are different perceptions about this kind of training, two main questions are analysed in this study, whether the trainers for ESP courses should be professionals or English teachers. The answers varied depending on the needs and type of training required, but most importantly, the answers emphasized on the importance of administrators and university to be involved with the collaboration and creation of teaching materials.