The winger who will be twenty nine in August, has played for SC Freiburg and Dutch sides FC Twente and Feyenoord.
Since 1999,he has made 106 appearances (plus 55 as a substitute) scoring ten goals.
Cairo's agent Humphry Nijman confirmed he will sign a one-year deal with the option for a further year at the Ricoh Arena. "We have reached an agreement and as soon as he has undergone his medical, Ellery will sign," Nijman told Kicker magazine. "That should happen in the next few days."