2D materials, the most famous of which is graphene, are promising for sensing and quantum technology. Hexagonal boron nitride (hBN) is a layered 2D material that is exciting thanks to its ability to host quantum emitters / single photon sources. By combining hBN with silicon photonic devices, we recently demonstrated the very first cavity optomechanical system with this material, and are working to realize quantum technologies that utilize our ability to control photons and phonons within it.