The article presents an analysis of the literature indicating the potential relation between the level of employees' engagement and the level of information systems (IS) reliability in the organization. Next, empirical studies are presented to verify this relation as the first step of the analysis verifying IS as a potential factor that could shape the level of employees' engagement in the organization. The article contains a description of empirical research conducted in 2018 among 557 organizations operating in Poland and the results show that there is a statistically significant relation between the level of employees' engagement and the level of IS reliability in the organization. The strongest relation is identified between the level of employees' engagement and the level of IS usage reliability perceived by employees, which is consistent with the analysis of the literature.