In the early 1970's Lex appeared as a Gunman in
NUMBER 96 series, 1974 episode 599. In the late 1970s, Marinos began presenting on the ABC youth radio station
2JJ, later becoming a presenter on
ABC Local Radio, including the show
Late Night Legends on
ABC2. With
Ted Robinson, he was also a presenter on radio station 2JJ (Double Jay), now
Triple J, in the late 1970s. He has since worked as a radio presenter on various ABC and commercial networks. He had recurring roles in television series
City West (1984),
Embassy (1991–1982), miniseries
The Slap (2011) and
Fighting Season (2018). He also appeared in several films including ''
Cathy's Child (1979), Hoodwink (1981), Goodbye Paradise (1983), Pandemonium (1988), The Last Days of Chez Nous (1992) and Backyard Ashes'' (2013). Marinos acted in theatre productions with
Nimrod, the
APG,
Sydney Theatre Company,
Melbourne Theatre Company,
Company B,
Big hART. He also directed numerous stage productions, including a 1980 tour of
No Room for Dreamers across Australia, England, Scotland and Ireland. He co-founded the King O'Malley Theatre Company. He was also a member of the creative and production team for the Opening Ceremony of the
Sydney 2000 Olympics, directing the segment 'Arrivals' about immigrants arriving in Australia. He was the director of 'Carnivale', NSW’s multicultural arts festival, from 1996 to 1999. He was executive producer of the Yeperenye Federation Festival, for the Centenary of Federation Celebrations in Alice Springs. He was a frequent speaker and writer on arts and cultural diversity. In 2008, he delivered the tenth annual
Tom Brock Lecture, on the history of Australian immigration and
rugby league. He was also guest tutor at several theatre and screen colleges. Marinos's book "Blood and Circuses: an irresponsible memoir" was published by
Allen & Unwin. He has also written for film, television, radio, and stage, as well as the publications
The Bulletin,
The Weekend Australian, and the
Good Weekend. He was a proud member of
Actors Equity since 1970. ==Honours and awards==