Joachim Gauthier was born in North Bay, Ontario in 1897. At the age of seven he received an award of excellence for drawing in chalk on the blackboard.
While visiting his sister in Tacoma, Washington, he received an apprenticeship as a sign writer. He later began to take life - drawing classes with noted sculptor Victor Alonzo Lewis. Also while in Washington he was introduced to "en plein air" painting.
Upon retuning to North Bay he met his future wife, together they moved to Hamilton, Ontario, and later Toronto.
In Toronto, Gauthier began a career lasting over three decades with Sampson - Matthews a design firms. He worked, and painted with many notable artists such as Franklin Carmichael, A.J. Casson, and Herbert Palmer.
Gauthier was a charter member of the Canadian Society of Painter in Watercolour, The Ontario Society of Artsits, and The Royal Canadian Academy of Arts.
He was commissioned by the McMichael Conservation Collection at Kleinburg to do portraits of Tom Thomson, The Group Of Seven and some of their contemporaries.
He died in 1988.