Full back Elliot is enjoying his second spell with the O’s, having originally represented the club on 62 occasions from 2010 to 2011 before returning to Brisbane Road in January 2013.
The 25-year-old started out his career at Fulham, where he made eight appearances for the Premier League side during a four-year spell that included a season-long loan at Norwich City in 2008/09.
Omozusi also spent a brief period on loan at Charlton Athletic during season 2009/10 before signing for Orient in January 2010, where he would stay until a criminal conviction saw him sent to prison.
Following his release from prison in 2012 Elliot began to train with the club during the autumn, and subsequently signed a contract with the club in January 2013 until the end of the season and went on to make six appearances and signed a new one-year deal that summer.
The defender was a key part of the Orient backline last season, making 50 appearances for the O’s, mostly coming at left back. Following his impressive season, the club exercised a clause in his contract to extend his current deal, which will see him remain with the club for the upcoming season.