Nowadays, the concept of performance can be related to almost any field of activity, taking into consideration the fact that setting, achieving and even exceeding goals appear to be of constant interest for individuals involved in working activities. Additionally, research literature is rich in notions related to performance measurement, evaluation and management. The same interest in literature is met for the concept of teachers’ self-efficacy and evidence show these two concepts are strongly related one to the other. Hence, the current study aims to bring a new perspective for these topics by analyzing work performance and self-efficacy in the field of education employees, i.e. high-school teachers, and the extent to which they perceive their self-performance and self-efficacy levels. As the present paper focuses on determining the level of the previously mentioned concepts among high school teachers from Romania, the data were gathered through an online questionnaire, answered by 603 Romanian high-school teachers and later analyzed according to quantitative research methods. The results of this study, consistent with the methodology used and within the limitations, show a high level of both perceived work performance and perceived self-efficacy among the high-school teachers. These facts could be of great interest for educational stakeholders, fellow researchers and policy makers.