Atomically thin 2D materials offer incredible promise as a materials system for 21st century engineering. For instance, different 2D materials can be combined to add new functionalities, such as modified band structures or paramagnetism. These stacks can then be combined with other functional platforms, such as nanophotonic systems or metasurfaces, to realize additonal functionalities such as integration with optical networks. Incredibly, if the processing and engineering is performed carefully the materials will maintain excellent optical and electronic properties. Transition metal dichalcogenides, a semiconducting class of 2D materials, are of particular interest for optical engineering. Excitons - bound states of electrons and holes that are a fundamental optical excitation in semiconductor systems - can dominate the optical response of these systems. These excitons are characterized by high binding energies and fast optical transitions, which can open new regimes for engineering and physics. Furthermore, the excitons can be readily tuned by electric and magnetic fields, enabling new optical technologies. We will creatively utilize the unique properties of 2D materials to push optics in new directions.