A computing system comprises a module cage for containing a system board and a plurality of pluggable modules, the module cage having a front face, the pluggable modules arranged in at least two rows of pluggable module locations extending parallel to the front face within the module cage. A layered module locking system including a sliding front locking handle and a sliding rear locking handle is provided. the sliding rear locking handle extending beneath the front locking handle. The sliding locking handles each includes at least one locking feature for slidably engaging with at least one foot of a pluggable module.