NAVAIR intends to award a sole-source IDIQ contract to Northrop Grumman Systems Corporation for MQ-4C Triton engineering, sustainment, and logistics support for the United States Navy and Royal Australian Air Force. The anticipated work includes non-recurring engineering, software and cybersecurity sustainment, integrated logistics support, engineering changes, technical directives, trade studies, and engineering investigations. This is an active presolicitation notice, not a request for proposals, and no contract will be awarded based on offers received in response to it.