East Thurrock United have signed the ex-West Ham and Charlton defender following his Billericay Town departure.
Konchesky, 37, also played for Leicester City and Liverpool and the Essex club have confirmed he will take up a player-coach role at Rookery Hill.
Manager John Coventry says his experience will be invaluable with the club hoping to push for promotion next season.
He told the club’s website: “I am delighted Paul has agreed to join us, he will bring a significant presence to our club as a player and his knowledge of the game at the very highest level will be something our young players will gain massively from.
“They can’t help but learn from him and as a player he will also be a significant asset to our squad.
“It may not be the division’s biggest but we are trying to build a team of quality that people will enjoy watching.
“The fact that Paul has joined us when there would have been a lot of doors open to him is a huge thing for our football club.”