Marmin is aligned with the neopagan faction of the French New Right.[4] In 1971, he was recruited by media entrepreneur Raymond Bourgine and began to work as a cinema critic for Valeurs Actuelles (1972–1978).[5] Upon the public launch of GRECE's magazine Éléments in September 1973, Marmin became its first president, followed by Pierre Vial in 1983.[6][7] He also served as the deputy secretary general of GRECE, in charge of press relations.[8]
In September 1976, he co-founded the publishing house Copernic.[8] Marmin then worked for Le Figaro between 1978 and 1980, and as the redactor-in-chief of the encyclopedia branch of Éditions Atlas [fr].[5] Between 1991 and 1992, he served as the president of GRECE.[9]
He is the co-scenarist of the films Pierre and Djemila (1987) and Ainsi soit-il [fr] (2000), which led to controversies in the media due to his far-right involvement.[10][11]
In 2012–2013, Marmin was among the sponsors of TV Libertés, a far-right web TV.[12]
^Camus, Jean-Yves; Monzat, René (1992). Les droites nationales et radicales en France: répertoire critique (in French). Presses Universitaires de Lyon. ISBN978-2-7297-0416-2.