Former West Ham man joins up.Dominic had previously spent a season with Barnet after leaving West Ham, and he will take squad number 25 during his time with Colchester United.
"That desire and hungry is really important to me. He will go straight into Saturday's squad for the trip to Rotherham."
"He's had a successful trial and fits the bill of someone who has lost his way in the game a bit, but has the drive and hunger to get back into it again.
Joe told the official website: "We are pleased to have him on board.
Dominic, who has recently been trialling with the U's and scored in the 1-0 reserves win over Charlton Athletic, has initially penned a monthly contract with Joe Dunne's side.
The U's have bolstered their forward ranks ahead of Saturday's trip to Rotherham with the addition of front man Dominic Vose on a free transfer.