Sergio Blardony was born in Madrid in 1965, where he begins, at Royal High Conservatory of Music of Madrid (Real Conservatorio Superior de Música de Madrid), his musical career, his higher studies having essentially been autodidact. Afterwards, he studies composition with Roberto J. de Vittorio and –for four years- with the composer José Luis de Delás at the School of Music of the University of Alcalá de Henares. He has also attended both composition and analysis courses with professors Heinz-Klaus Metzger, Rainer Riehn, Helmut Lachenmann, Enrico Fubini, Luis de Pablo, etc.

He has been awarded various prizes, such as the Spanish Authors Society (SGAE) Composition first price, the International "City of Tarragona" Award for Musical Composition, Shut Up And Listen! Award (Viena), “Joaquín Turina” Prize, Space Laboratory Contest 2016 and 2020, or New-Music Consortium 2019 University of South Florida.

His compositions have been played in different countries –Argentina, Austria, Brazil, Bulgaria, Canada, Korea, Cuba, China, Czech Republic, England, Ethiopia, France, Germany, Ireland, Israel, Italy, Mexico, Nepal, Portugal, Russia, Spain, Switzerland, Uruguay, USA...-, by artists like Arturo Tamayo, José Ramón Encinar, José De Eusebio, Olari Elts, Alexis Soriano, Nacho de Paz, José Luis Temes, Andrés Salado, Ángel Gil Ordónez, Olari Elts, Jonathan Carney, Andrés Gomis, Jean-Pierre Dupuy, Mario Prisuelos, Mª Carmen Antequera, Patricia Rozario, Flavio Oliver, Carlos Bonell, Florian Popa, Francisco A. García, Sebastián Mariné, José Mª Mañero, Juan Aguilera, Eloy Lurueña, Trío Arbós, Trío Gombau, SIGMA Project, Ensemble Regards, TDM Trío De Magia, OCAZEnigma, Proyecto OCNOS, Vertixe Sonora, Ensemble Kuraia, Ensemble Télémaque, Ensemble Décadanse, Neoars Sonora, Espai Sonor, LIM, Proyecto Guerrero, Sax-Ensemble, Plural Ensemble, neSeg, Continuum XXI, Ensemble Falla, National Orchestra of Spain, Youth Orchestra of the Comunidad de Madrid (JORCAM), Spanish National Youth Orchestra (JONDE), Barcelona Orchestra/National Orchestra of Catalunya, State Hermitage's St. Petersburg Camerata Orchestra, Orchestra of Cadaqués, Orchestra of Extremadura...
 
Sergio Blardony has composed over 80 works for all manner of instruments and voice: solo and chamber music, ensemble, orchestral, vocal and choral, electroacoustic and multimedia, music-theater…

Almost all his works premiered have been recorded by various radio stations and television channels (Radio Clasica-RNE, Catalunya Radio, RTVE-La 2, Radio France, Deutschlandfunk Köln...). His compositions are published by various music publishers (Bèrben Edizioni Musicali, Pygmalion, EMEC-Spanish Editor of Contemporary Music, Periferia Sheet Music, Babel Scores...). His current publishers are UME (Unión Musical Ediciones) of the British multinational group Music Sales and the French publisher Babel Scores.

He is director of the magazine Sul Ponticello, director of EPOS Laboratory of creation and research music-word, artist curator of [inter/ciclo] (international section of COMA Festival), codirector of the cycle TRASHUMANCIAS. Interdisciplinary Conference, and co-director of the Doble Fondo radio project, besides participating in other initiatives and cultural and educational projects.