Orlando City have announced the signing of Shane O'Neill on a three-and-a-half-year contract.
O'Neill joins from Dutch side Excelsior and will count as a homegrown player eligible for selection after the secondary transfer window opens on July 10.
"We are pleased to add Shane to our roster," Orlando City general manager Niki Budalic told the club website. "He is an athletic defender who is competitive and hungry to succeed.
"Shane's experience in MLS and Europe in addition to various U.S. national teams will be valuable as we head into the second half of the season."
Irish-born O'Neill started his career at fellow MLS side Colorado Rapids, making 52 league appearances before joining Cypriot side Apollon Limassol.
He spent time on loan at Belgian club Mouscron, English League Two side Cambridge United and Dutch outfit NAC Breda before moving to Excelsior in 2017.
O'Neill has also been capped 21 times by U.S. youth teams.