The purpose of the present study is to learn about English conversation instructors, in particular, to find out (1) who they are; (2) how they cooperate with English teachers at schools; and (3) what needs they have to serve better as English teaching staff at schools. An online survey was administered to all English conversation instructors at elementary and secondary schools in Korea. Around 4,630 English conversation instructors- 2,920 at elementary schools and 1,710 at secondary schools- participated in the study. The collected data were analyzed: (1) to describe the characteristics of English conversation instructors; (2) to examine how they are sharing teaching duties with English teachers; and (3) to assess the needs for their competency development. The needs of English conversation instructors were analyzed by calculating the gap between the current competence and the expected competence. The difference of English conversation instructors competence development needs at the elementary level and at the secondary level were then further analyzed through Analysis of Variance. The results of this study can be used as basic data to establish the training system for English conversation instructors’ competence development.