Robert (Bob) McCannon came to Pueblo, Colorado and CF&I in 1954 as a junior mine engineer in the mining department. In 1955, he went to Sunrise, Wyoming as a mining engineer. Next McCannon went to the Comstock Mine in Utah where he became the resident engineer in 1962. McCannon returned to the Sunrise Mine in 1968 as the mine's superintendent. One of his jobs was the terminator of assets. McCannon was employed at Sunrise until it shut down in 1980, and the assets were auctioned off in 1984. He then returned to Pueblo.