The ex Republic of Ireland international, joins after finishing a spell with fellow Vanarama National League side Solihull Moors, writes Tom Feaheny.
The 33 year-old has played for the likes of started his career at Peterborough United, Middlesbrough and Millwall.
His most succesful spell came at Preston North End in the Championship, where he made 185 appearances over a five-year spell.
The ex-Republic of Ireland international has also played in the MLS in 2015 – linking up with football icon Kaka at Orlando City, before moving on to Colorado Rapids.
St Ledger has 37 caps and three goals to his name for Republic of Ireland and scored a famous goal against Italy.
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