Having previously been director of rugby for amateur Irish club Young Munster, Prendergast joined French club Grenoble as a skills coach in 2013, where former Leinster and Ireland hooker Bernard Jackman was then defence coach. Ahead of the 2017–18 Top 14 season, Prendergast joined Oyonnax as their attack coach, before joining Stade Français, where former Munster teammate Paul O'Connell was also a coach, as their backs and attack coach for the 2018–19 season, after Oyonnax were relegated from the Top 14.