Sagardía was born in Asuncion, Paraguay. Since 1983 he has been living in Germany. He studied composition with Adriana Hölszky, Nicolaus A. Huber and Günter Steinke and electronical composition with Dirk Reith. He took part at the workshop “extending composition” who was conducted by Hans-Joachim Hespos.
Since 2007 he lives and works as a freelancer composer and screenwriter in Berlin.
In his compositions Sagardía deals with the philosophical definiton of music, its notation, its performing and expressing values and its character of being a pure matter of bodyless event. He further combines this artistical approach with different medias like film, video, theater and language.