Marinos signed for Australian rugby league club the Sydney Bulldogs in 1996, playing in one match.
[2] In 1997, he represented South Africa at the Super League World Nines.
[3] He later worked as the CEO of Rodney Parade, before returning to South Africa in 2005.
[4] He was the CEO of SANZAAR, a rugby committee in charge of expanding and maintaining the game of rugby union in South Africa, New Zealand, Australia and Argentina since late 2015.
[5] In December 2020 Marinos was announced as chief executive officer of Rugby Australia.