An electromagnetic (EMC) shielding system includes a bezel and a sleeve. The bezel includes an exterior opening aligned with an accessible computer enclosure component. The sleeve includes a shoulder portion in contact with the exterior of the bezel, a flange portion protruding into the interior of the bezel through the exterior opening, and a tunnel portion extending through the shoulder portion and flange portion. The accessible computer enclosure component generally is positioned within the tunnel portion. An EMC shielding method includes inserting the sleeve into an exterior opening of the computer enclosure bezel and installing the bezel to a computer enclosure such that the accessible component is positioned within the tunnel portion.