This page contains information regarding Star Trek: Discovery, and thus may contain spoilers.
Aditya Sahil was a male Human that lived aboard an old Federation relay station during the 32nd century. He was born to a Starfleet officer father. Sahil's grandfather was a Starfleet officer as well.
Around 3148, Sahil became the sole guardian of a damaged Federation relay station that came to be used as a courier waypoint, taking on the role of Federation liaison. Despite a strong belief in the ideals of the United Federation of Planets and an adherence to the Starfleet regulations, he went much of his adult life without meeting a single commissioned officer to formalize his role or even raise the flag of the Federation in his adopted office.
In 3188, Cleveland Booker and Commander Michael Burnham came to him trying to find the USS Discovery. Sahil shared that the station's long range sensors had failed decades earlier, limiting his scan radius to six hundred light years. He had no contact with other stations, could find no trace of Discovery, and the few passing ships that did have a Federation registry did not respond to hails.
As the first Starfleet officer he had encountered in decades, Burnham commended Sahil's dedication, and asked him to accept a commission as acting communications chief for the station. In this position, he would continue the search for the Discovery. Sahil accepted, Burnham raised a Federation flag that had belonged to generations of Sahil's family, and the two shared a moment as "true believers." (DIS: "That Hope Is You, Part 1")
After the defeat of Osyraa and the Emerald Chain in 3189, Sahil traveled to Federation Headquarters and was formally commissioned as a Starfleet Lieutenant by Admiral Vance. (DIS: "That Hope Is You, Part 2")