In 1963, he joined the National Film Board of Canada where he produced several award-winning documentaries in his native French language. A social activist, he made a feature-length documentary in 1970 titled On est au coton (We work in Cotton) that showed the exploitation of textile workers. The film caused an uproar that resulted in it not being distributed publicly for several years. Arcand received such publicity that it gave his fledgling career a great boost. He also worked on some television series, notably Duplessis, a historical work he wrote (but did not direct) about Premier Maurice Duplessis.

During the early part of the 1970s Arcand produced a number of feature films that received critical acclaim. Arcand returned to directing documentaries and did no work for television. In 1982, his documentary, Le confort et l’indifférence won the Best Film prize from the Quebec Film Critics’ Association. In 1986 he wrote and directed what was until then the highest-grossing film in Quebec (and Canadian) history, The Decline of the American Empire (Le Déclin de l’empire américain).

In 1988, he was made an Officer of the Order of Canada and was promoted to Companion in 2005. In 1990 the Government of France awarded him the Legion of Honour. He finally earned from his home province one of its highest distinctions, the title of Knight of the National Order of Quebec, in 1990.

Arcand produced and directed his first English language film in 1993, titled Love and Human Remains, and did so again in 2000, with the film Stardom, which opened the Toronto International Film Festival. He then spent two years writing the script for what many claim is his finest piece of cinematic writing to date, The Barbarian Invasions (Les invasions barbares). Released in 2003, the film won Arcand the Best Screenplay Award at the Cannes Film Festival, was nominated for a Golden Globe Award as Best Foreign Language Film and won the Academy Award for Best Foreign Language Film. In addition, Denys Arcand was nominated for an Academy Award for Writing Original Screenplay. The Barbarian Invasions won France’s 2004 César Award for Best Picture, Best Director, and Best Original Screenplay.

In 1995, Mr. Arcand received a Governor General’s Performing Arts Award for Lifetime Artistic Achievement. In February 2004, the government of France named Denys Arcand a Commander of L’Ordre des Arts et des Lettres, that nation’s highest cultural honour. In 2004, Arcand was also inducted into Canada’s Walk of Fame.

Arcand’s film Days of Darkness (L’Âge des ténèbres) was chosen to close the 2007 Cannes Film Festival. The press opening was subdued and the subsequent reviews were mixed. Following this, he took a seven-year hiatus from feature film directing; he returned in 2014 with the film Le règne de la beauté.