An engine assembly may include an engine structure, a camshaft supported for rotation on the engine structure, a drive member and a camshaft actuation assembly. The camshaft may include a first shaft, a second shaft located within the first shaft and rotatable relative to the first shaft, a first cam lobe located on the first shaft and fixed for rotation with the first shaft and a second cam lobe supported for rotation on the first shaft and fixed for rotation with the second shaft. The drive member may be fixed to a first axial end of the camshaft and rotationally driven to drive rotation of the camshaft. The camshaft actuation assembly may include an actuator coupled to a second axial end of the camshaft and rotationally fixed to the engine structure and relative to the camshaft.