Andrew (Andy) Paull was born to Dan Paull and Theresa Paull (née Lacket-Joe) on February 6, 1892 at Potlach Creek, near Squamish. He was raised in the village of Stawamus, near Squamish, British Columbia but later moved the village of Eslha7an in North Vancouver, British Columbia.
He attended St. Paul's Indian Residential School when it first opened in 1899 and remained a student there for six years. During this time, Paull served as an altar boy at the St. Paul's Mission Church. Afterwards, he likely spent two years receiving special instruction in Squamish affairs from local Squamish chiefs.
In 1907, he went to the law offices of Hugh St. Quentin Cayley and learned about the practice of law.
In 1911, Paull served as Secretary when chiefs from different Squamish reserves met together. In 1923, the seventeen Squamish bands were united into one. Paull served as the Secretary of the new Squamish Band Council between 1923 and 1934. Around this time, he also served as the Secretary of the Allied Tribes of British Columbia.
During the Allied Tribes of British Columbia's historic presentation regarding land claims to the 1927 Special Committee of the Senate and the House of Commons, Paull acted as a witness. Although the Committee rejected the land claims of the Allied Tribes, Paull's testimony was well-received and he achieved national recognition in Ottawa.
Throughout his life, Paull was a Squamish leader and activist. He fought for a number of issues including Indigenous rights and title, education, potlatching, and political organizing.
Paull was also a freelance sports reporter for the Vancouver Province in the 1930s and frequently played, managed or promoted sports such as baseball, lacrosse, boxing, and canoe racing. He occasionally appeared on radio programmes.
Andrew Paull married Josephine Joseph in 1914 and together they had seven children. Paull died on July 28, 1959 at St. Paul's Hospital in Vancouver.