In which ways will
a systematic professional development program contribute to the quality of English-medium
instruction lecturers? Based on a thorough literature review in which analytical analysis and
synthesis of the reviewed content emerge four categories of a challenge confronted by most English
medium universities. Concept matrix developed by Webster and Watson (2002) is used in analyzing
and synthesizing the relevant literatures. This article aims to provide insights into challenges
occurring from the Thai contextual factors. Furthermore, the article also points out a need and
supports an establishment of a systematic professional development program for the English
medium instruction lecturers.