He is the coach of French Elite One Championship club, Saint-Gaudens Bears and previously Toulouse Olympique.
[2] Dumas was a France national representative goal-kicking fullback, scrum- or stand-off half back in his playing days during the 1980s and 1990s.
[3] In early 1986 Dumas was selected to play for the France national rugby league team at fullback in a match against Great Britain for the 1985–88 World Cup tournament, scoring a try and kicking a goal on his national debut.
Playing as a scrum half but eventually settling into the stand-off position, he continued representing France in matches for the 1989–92 World Cup tournament as well.
[4] Dumas was national coach for the 2001 French rugby league tour of New Zealand and Papua New Guinea.