Greater Western Sydney has called upon Stephen Silvagni, Dermott Brereton and Craig Lambert to beef up its inexperienced coaching department under rookie coach Leon Cameron for the rest of 2014 following the Giants' recent horror run.

An internal review of the club's coaching structure has acknowledged shortfalls in the ongoing development of its much-envied young talent including the recognition that it has fallen behind in its players' physical development through the career-ending illness suffered by high performance boss John Quinn.

Greater Western Sydney has conceded 115 goals over its past five matches. Credit:Getty Images

The club's Melbourne-based list manager Silvagni will fly to Sydney weekly to work with the key defenders and defence coach Chad Cornes – the club's injury-depleted back six was slammed by Leigh Matthews during Saturday's 113 point loss to Richmond and has conceded 115 goals over the past five matches – an average of 143 points a game.

Welfare manager Lambert, who was Brisbane's midfield coach over its three premierships, has been called upon to assist the two recently retired Giants' midfield coaches James McDonald and Dean Brogan, while Brereton has been approached to assist senior assistant and forwards coach Alan McConnell. Brereton had ended his part-time work with the Giants last year partly due to a back injury.