Various implementations include an occupant monitoring system (OMS) for monitoring at least one occupant in a vehicle. The OMS includes a mounting bracket coupled to a rotatable portion of a steering wheel assembly, a housing coupled to the mounting bracket, at least one imaging unit disposed within the housing, and at least one lens disposed adjacent the housing and imaging unit and facing an expected position of at least one vehicle occupant and configured for allowing light to pass through to the imaging unit. The mounting bracket extends upwardly from the steering wheel assembly adjacent a central portion thereof. The housing has a back surface that is disposed adjacent a back cover of the steering wheel assembly. The imaging unit has a field of view inside of the vehicle and is configured to capture an image signal corresponding to an imaging area within the field of view.