[2] Heisey pioneered the exploration and development of the Sanshaw/Red Lake metal deposits located in northwest Ontario.

[4] Heisey family members have farmed in various parts of York Region, including Gormley and Markham Village.

Heisey was of Tunker descent (Brethren in Christ Church) a pacifist German sect of Anabaptism.

Red Lake was inaccessible by road until 1947 when Ontario Highway 105 was constructed and the only access prior to then was by boat or plane.

[23] He was the manager and driving force of the Sanshaw Gold Mine which was developed on White Horse Island during 1936–7.

Heisey's crew uncovered a previously unknown well-mineralized shear and gold vein in 1936 which was the most important discovered up until that time in the Red Lake area.