Laucys impressed for the Hawks during pre-season, before heading back to his native Lithuania for a trial. Danny Chapman has now secured his services to bolster the Hawks' defence.
Laucys came through the academy at Brentford and he has also featured for Concord Rangers and Hemel Hempstead.
He can play at right back or right centre back, and will be available for selection for tonight's home game against Needham Market. Kick off is at 7:45pm.