It is Beattie's first coaching job at a Premier League club, but he has been in charge of a lower league side already in his short time since retiring from playing.
Beattie had just over a season in management when he took charge of Accrington Stanley in 2013. The ex England striker only managed to win 28% of his games at the Crown Ground though, and soon found himself leaving the club.
The 37-year-old now finds himself linking up with his former Southampton teammate Garry Monk at Swansea, with the Liberty Stadium boss arguably the Premier League's most promising up and coming manager.
Both were at the Saints in the late 1990s and early 2000s, with Monk taking in various loan spells before departing for Barnsley, and Beattie starring on the South Coast before being sold to Everton.
Beattie will get the chance to work at a top Premier League without the pressures of being the one ultimately responsible for performances.
Swansea achieved their best ever points total and highest ever finish last season, a campaign that was Monk's first complete season in charge of a football team.