In that year, Aaron had held an important position at Starfleet Headquarters. At some point, Aaron had become infected with the parasite and was under the control of an alien mother creature that had taken residence in Lieutenant Commander Dexter Remmick. When the USS Enterprise-D returned to Earth to respond to suspicions of a conspiracy by these creatures, Aaron greeted Captain Jean-Luc Picard and invited him to dinner. When Picard arrived, co-conspirators Savar and Tryla Scott, as well as several security commanding officers, all joined Aaron in cornering him in a dining hall and showing him how their people fed on live vermicular lifeforms. When William T. Riker posed as one of the possessed officers in order to recover Picard, Aaron fired on the Enterprise officers and fled, seeking Remmick. Picard and Riker disabled Aaron with phaser fire just outside of the Remmick's communications room. The parasite fled Aaron's fallen body and was ingested by Remmick. (TNG: "Conspiracy")
It is unknown whether or not the phasered officers were killed or simply disabled by the high-power blasts that separated them from the aliens. Admiral Aaron was played by Ray Reinhardt. His rank insignia was an admiral braid and two pips, indicating a vice admiral in the TNG season one rank insignia.
In Star Trek Conquest game, Aaron was a player character in a reality where the Milky Way Galaxy was embroiled in conflicts between multiple species and cultures. In 2364, Aaron held the rank of commodore and was in command of a fleet during the conflict.