Though originally trained as a printer, he taught himself to draw and paint.
His early works were predominantly terra-cotta and plaster, but by 1945, he was sculpting almost exclusively with stone.
His earlier sculptures were very abstract and geometrical, and also quite large in size.
In the mid-1950s, Aeschbacher began using mostly volcanic rock as a medium, and his sculptures became more fluid and smaller.
[1] His work Explorer I is located at the Zurich Airport.