Gallagher became signing number ten ahead of the 2026/27 campaign on a season-long loan from Championship side Lincoln City.

A product of Derry City’s Academy, Oisin moved to England in the summer of 2021, where he signed his first professional contract with the Imps and made his debut for the club in an EFL Trophy fixture the following year, before making his League One debut against Blackpool in January 2024.

Since arriving at Lincoln, the young midfielder has experienced multiple loan spells, including Boston United, where he made a total of 33 appearances, with 27 of those coming in the 2025/26 National League campaign, helping the Pilgrims to a 12th-place finish last season.

Oisin has also represented the Republic of Ireland across a couple of different age groups and most recently scored on his debut for the u21s against Kazakhstan in March.