The Under Secretary of Defense for Research and Engineering (USD(R&E)) serves as the primary advisor to Department of Defense (DoD) leadership on all matters about the Department's Research and Engineering (R&E) enterprise, technology development and transition, developmental prototyping, experimentation, and administration of testing ranges and activities. USD(R&E) has the lead responsibility within the Department for synchronizing Science & Technology (S&T) efforts across the DoD, the Joint Staff, and the Services.