Marquis began his senior career in 1950 with Devonport in the North West Football Union (NWFU).

The next season, he won the club's Best and Fairest award, as well as playing for both the NWFU and Tasmania in representative matches.

[1] In 1953, Peter Marquis began his six-year auspicious career with Melbourne in the Victorian Football League (VFL), and played as a full back when the Demons overcame Collingwood in the close 1955 and 1956 Grand Final matches.

Later he returned to Tasmania and played with North Hobart in the Tasmanian Football League (TFL).

Marquis is the grandfather of North Melbourne Football Club player, Hugh Greenwood.