Former Ireland international midfielder Liam O'Brien has been appointed as Assistant Coach until the end of the season.
O'Brien fills the vacancy left by John Toal, who departed the post last week due to scheduling problems and work commitments.
The ex-Man United, Newcastle and Tranmere player has previously occupied similar roles at Cork City and Bohemians.
O'Brien brings with him a wealth of experience and will begin in his new role this evening as the Saints take on Shelbourne in Tolka Park tonight. Kick off in Drumcondra is 8pm.