In this paper, we present our DCU and HCMUS team’s participation in the NTCIR16 Lifelog-4 task by using two different retrieval systems, namely LifeSeeker and Myscéal that were originally introduced in the Lifelog Search Challenge (LSC) and adapted for addressing the Lifelog Semantic Access Task (LSAT). To tackle the task in an automatic manner, both LifeSeeker and Myscéal employed pre-processing techniques as part of the retrieval process, while LifeSeeker further utilised a post-processing step to refine the retrieval results. Regarding the interactive manner, we evaluated the Myscéal system by conducting a user study on both expert and novice users in both ad-hoc and known-item-search settings.