Brad Yacobian was a Human Starfleet officer of the 24th century. He was a captain in the late 2360s.
In 2367, he was named as a Orbital Operations officer on the dedication plaque of the USS Sutherland. (TNG: "Redemption II", dedication plaque)
In the late 2360s, he was assigned as a squadron leader for Falcon Squadron, Third Academy Training Wing, at Starfleet Academy. His name, rank, and title were on a Flight Proficiency Award for Harry Kim. (VOY: "Non Sequitur", set artwork)
He was named as a Fleet Ops officer on the dedication plaque of several Federation starships (USS Voyager, dedication plaque; VOY: "Message in a Bottle", dedication plaque)
This character was only mentioned in writing.