Cassiano dedicates himself seriously to the art world in 1980 with the guidance of master João Giga and Daniel Vieira, working with them until 1986,
assumes responsibility as coordinator of the art gallery under the mandate of Eng. João Meireles, then president of Lusotur SA.
Performing these duties over a period of four years.
He returned to the art world in 1994, collaborating with master João Giga and his friend painter, sculptor and writer Victor Borges, until 2000.
Since then his research and development in the art world has been constant.