A heat sink assembly includes a base frame and a heat sink having a module
engagement surface configured to be in thermal communication with an
engagement surface of a pluggable module. The heat sink assembly also
includes transfer links extending between the heat sink and the base
frame. The transfer links are movable to transfer the heat sink with
respect to the base frame. The heat sink is movable between a recessed
position and an elevated position, wherein the transfer links maintain
the heat sink in a predetermined orientation with respect to the
engagement surface of the pluggable module as the heat sink is
transferred, between the recessed position and the elevated position.