Jamaican international Omar originally signed for Darlington after playing in the USA for Real Salt Lake City, Real Monarchs and Bethlehem Steel.
A tough tackling midfielder, Omar scored his first goal for the club in the home win over FC United on 6th April.
He signed for the 2019-20 season after a successful pre-season build up.
The midfielder has played for his country at Under 17, Under 20, Under 23 and senior level.
Home kit sponsor: Paul O'Cain
Away kit sponsor: Kevin Luff