He is the current manager of Victorian State League Division 1 club Brimbank Stallions FC, with whom he achieved back-to-back promotions in 2017 and 2018.

His father, Franz, was a soccer player who had represented Allemannia, George Cross, Wilhelmina and USC Lions in Melbourne, and Hollandia in Brisbane.

[2][3][4] Marth broke into the senior setup at National Soccer League club Sunshine George Cross FC.

[1] In the 1990–91 season, he won the Minor Premiership with Croatia but lost the Grand Final by penalty shootout to bitter rivals South Melbourne FC.

[6] Marth left the Knights at the end of the 1997–98 season, taking up a lucrative offer from Carlton SC, expressing vexation with the club's recruitment policy.

[12][13] Melbourne Knights, now playing in the VPL, went through a mini-revival after the appointment, escaping relegation by some distance but missing out on making the finals' series.