The Norwegian artist came to the U.S. in 1910 and was educated at the divinity school at Northwestern University. As a seaman, he traveled around the world five times. He served in the Army during World War II. After the war, he sculpted bronze busts and a winged figure for Rand Tower in Minneapolis; he also contributed artwork for the Boulder Dam. According to Robert A. Sideman, Hansen worked with major architects such as Holabird & Root. In later life, he lived at Pantops, formerly part of the property at Monticello.