I am doing 3D Modelling, from 2d(cad drawing) to 3D model with all the trades of(structural,architectural and MEP). i do clashed detection and Bill of quantities from the 3D model. i issue also sheets from 3D model to 2d(cad format). I'm have a strong knowledge in Revit 4 yrs in experience and currently working with a international company with a very sttrong quality of work.