Alejandro Castañeda was born in Castelló de la Ribera, Valencia. He studied at the School of Music Lira Castellonera with professors Faustino Candel, Hermeregildo Rosas and José María Alba. Later, he studied at the Conservatory of Music of Valencia with Mr. Vicente Prats. He has done courses with prestigious trumpeters as Maurice André, Guy Touvron, Manuel López Torres, George Vosburgh and José Maria Ortí, among others.
From 1982 to 1998 he performed as the principal trumpet of the Philharmonic Orchestra of Gran Canaria. Between 1998 and 1999 he worked as the Principal Trumpet in the Granada City Orchestra. He has collaborated with various national and international orchestras such as Orchestra of Malaga, Valencia Orchestra, Orchestra of the Principality of Asturias, RTVE Orchestra, Gothenburg Symphony Orchestra and Mariinsky Theatre Symphony Orchestra. He has taught advanced courses throughout the Spanish geography: Murcia, Alicante, Valencia, Albacete, Cartagena, Las Palmas de Gran Canaria, etc.
He is currently Professor at the Conservatory of Murcia, Trumpet Soloist of the Orchestra of Murcia and a member of the brass quintet Murcia Brass. From 2013, he has been Guest Teacher at National Conservatory Don Bosco in El Salvador.