Hersi flies in from Holland on Sunday and, pending approval from club doctors, will sign with the Mariners until the end of this season with a view to stay longer.

Chief executive Shaun Mielekamp said if all goes well he expects Hersi to be available for Saturday week's away match with Wellington.

"We've got to go through the medical and get through that part, then we're currently working through until the back end of this season and potentially next season," Mielekamp told AAP.

Hersi made his A-League name playing an integral role in the Wanderers' history-making inaugural season, though he was suspended for their grand final appearance.

Mielekamp expected the 33-year-old winger to add valuable experience to coach Tony Walmsley's young squad, which will also benefit from the leadership of newly arrived former Liverpool star Garcia.

The main concern would be whether he has fully recovered from the hamstring tear that hampered his time at Perth last season.

Hersi has been training with a club in Holland since the Glory released him in May after only eight appearances.