摘要:AbstractThe process of quality assurance in the study of foreign languages in Technical Higher Education fosters employers’ confidence in the graduates. In this sense, teacher quality matters. It influences school achievement and learners’ professional performance. The current research identifies those teacher qualities likely to sustain teacher effectiveness and the learner's performance and smooth insertion onto the labour market. Successful delivery of foreign language education depends on a culture change that accepts both the language teacher and engineering learner (engineering student or technical high school pupil) as customers of each other. Hence, laudable educational initiatives should take sufficient account of those competences and features that could frame a “quality English teacher” and lead to quality assurance in engineering students’ language performance, a prerequisite for their successful professional mobility.