Jack Regan had been training with the Highlanders in the new year.
Birr's Jack Regan has signed a short-term contract with New Zealand Super Rugby Franchise the Highlanders.
The 23 year-old lock had been training with the club following the conclusion of a promising Mitre Cup campaign with Otago.
He is expected to provide cover for injured New Zealand Maori lock Pari Pari Parkinson.
The details of the former Leinster and Ulster man's contract are yet to be released.
The Super Rugby season gets underway in February.