The mission of the Helmet-Mounted Systems Technology (HMST) Advanced Development Program Office (ADPO) is to demonstrate advanced helmet systems to the using community. Months, sometimes years, of coordination with engineers, logisticians, air framers, safety personnel, pilots, and others, pass by before the first day of system integration into the aircraft can begin. One such integration and demonstration occurred during January and February 1993. With HMST acting as the Integration Engineer, the Air Force Special Mission Operational Test and Evaluation Center (SMOTEC) conducted an Operational Feasibility Test and Evaluation (OFT&E) of a Helmet-Mounted Tracker and Display (HMT/D) system on a MH-53J PAVE LOW. The addition of the helmet display, helmet tracker, and wider field-of-view of the Forward-Looking InfraRed (FLIR) sensor were only a few of the integration issues that had to be resolved prior to the first flight. This paper will focus on the coordination, integration, demonstration, and evaluation of the HMT/D in the PAVE LOW.