Development of inertial fusion energy (IFE) will require continued research and development in target physics, driver technology, target production and delivery systems, and chamber technologies. It will also require the integration of these technologies in tests and engineering demonstrations of increasing capability and complexity. The development needs in each of these areas are discussed. We show how IFE development will leverage off of the Department of Energy (DOE) Defense Programs funded inertial confinement fusion (ICF) work.