LLSs (language learning strategies) are the strategies selected by learners to comprehend, retain, retrieve, and use information in language learning deliberately and consciously. It has been established that LLSs have significant effects on second language learning. The purpose of this study is to explore the LLSs employed by the ESL students in learning English language at one of the Independent Chinese secondary Schools in Malaysia. By adopting a case study approach, nine students of three proficiency levels (high, average, and low achievers) in the school were selected as participants. The investigation was framed through Oxford’s (1990) classification of LLS to contextualise the students’ LLS for thematic analysis. The findings reveal that high achievers often use metacognitive and cognitive strategies. The average achievers and low achievers often use a wide range of strategies. In addition, the students are able to self-direct their English language learning with the LLS they employed outside the formal classroom autonomously. Recommendations for further/future research related to LLS are provided.