A 3D animator is an artist who designs animated graphics and puts them into a sequence.
Cutscene animator is dedicated to create in close collaboration with the storyboarder unique animations for cutscenes. The cutscene animator is also in charge of the Lipsync, and can be in charge of the integration of the assets within the 3d engine to create the cutscene.
Gameplay animators are dedicated to creating animations that are used during gameplay, these animations are mostly made to loop. He can also be in charge of integrating and configuring the animations within the 3d engine