This thesis entitled "English Lecturers’ Perception of Their Professional Development ". The aim of the research is to investigate the perception of English lecturers of their professional development. In completing the data, I used qualitative research involving 6 participants, it consists of 3 full-time lecturers and
3 part-time lecturers. The participants of study are English lecturers of UIN Ar- Raniry Banda Aceh and I took a purposive sampling. I used semi-structured interview which allow lecturers to freely answer the questions. Based on the result of interview that I conducted, all participants had similar perception toward their professional development, including improved pedagogical competence, peer assistance, and shaping their attitude. On the other hand, full-time and part-time lecturers have different strategies in improving their professional development. For example, full-time lecturers have applied new teaching method in the classroom while part-time lecturers have discussed teaching issues such as understanding students’ background and discussing the solution of teaching problem. It can be concluded that all lecturers have their own ways to achieve the goal of learning or to engage students in the classroom.