Tacit knowledge provides organizations with a significant competitive advantage. It is critical to share tacit knowledge among personnel to reap the benefits. Individual and social factors play a significant influence in encouraging information sharing, according to study. However, it is unknown whether those elements have an equal impact on the knowledge seeking and acquisition of recipients. To fill up these gaps, this study looks at how millennials in Nigeria share and seek for tacit knowledge. Staff, employees and working professionals aged 25 to 40 in Lagos Nigeria, was the target demographic. Quantitative data was collected as part of the research. An online poll with a total of 110 respondents was used to acquire the quantitative data. Working professionals were asked to respond to questions about trust and self-efficacy, as well as how this affect knowledge sharing and seeking. The paper shows how self-efficacy and trust affect the amount of information sharing and seeking among working professionals in Lagos, Nigeria.