Hanson had been employed as an assistant defensive backs coach before the Aug. 5 incident and hadn't been around the Raiders' facilities since then.
Hanson accused Cable of assault during a meeting at the team's training-camp hotel in Napa, which resulted in the assistant being treated for a broken jaw the following day. Cable denied any wrongdoing, and Napa County District Attorney Gary Lieberstein declined to pursue charges against the head coach following an investigation.
Hanson arrived at the team's headquarters Wednesday and went to work in the personnel department.
Cable said he was surprised by news of Hanson's return.
"Sure, but right now my focus is this football team," Cable said. "That's behind us, and we're moving forward."
Copyright 2009 by The Associated Press