Leo grew up near a dump. He has played with junk for over 50 years now and has developed his own assemblage techniques. His works are collected by museums and individuals throughout the world. Leo continues to cull the refuse of Philadelphia out of which he fashions all pieces of all sizes, from a lifesize cat to a forty foot installation. His sculptures are composed of recognizable objects of plastic, metal and wood. These objects are chosen for their color, shape, texture, durability and patina; then they are constructed of stainless steel, brass, or aluminum found objects which are welded together. He also does work by commission. He can also use objects from the patron's past for a more personal assemblage.