A valve train assembly includes a valve bridge assembly. The valve bridge assembly includes: a valve bridge; a first cavity formed towards a first end portion of the valve bridge; and a hydraulic lash adjuster (HLA) disposed within the first cavity, the HLA for engaging a first valve stem. The valve train assembly further includes: a pivotally mounted first rocker arm for engaging the valve bridge and to pivot in response to a rotating first cam to cause a first valve lift event in an engine cycle. The first rocker arm includes: a rocker arm cavity formed within an end portion thereof; and a control capsule disposed within the rocker arm cavity, wherein the control capsule is configurable in an ON configuration and an OFF configuration.