The conductor Aleksandar Spasić studied conducting at the Academies of Music in Belgrade and Ljubljana. He finished his studies at the Rimsky-Korsakov St. Petersburg State Conservatory. He also finished his studies in bassoon at the Academy of Music in Ljubljana.   

He perfected his conducting skills in Weikersheim and Vienna. During his studies he won the 4^th Award at the International Competition of Young Conductors in Zagreb and was also awarded the Student Prešeren Award in Conducting. He held the post of Conductor of the Domžale – Kamnik Symphonic Orchestra for nine years,  the post of Artistic Director of the Classical Music Concert Series, organised by the Ljubljana Students' Cultural Centre ŠKUC for six years and the post of Conductor of the String Chamber Orchestra Pro musica for three years. From 1994 to 2008, he was a Professor at the Ljubljana Music and Ballet Conservatory, from 2001 a Founder, Organiser and Artistic Director of the Črnuče September Festival, from 2002 a Conductor and Artistic Director of the Contemporary Music Chamber Orchestra and Ensemble Gaudeamus, from 2003 to 2010, a Conductor of the Mixed Choir SCT Ljubljana, from 2005 to 2011, a Conductor of the Coastal Chamber Orchestra in Koper and from 2010, a Conductor of the Mixed Choir Svoboda Mengeš.

Both as a conductor and as a bassoon player Aleksandar Spasić stimulated various composers to premiere their new music pieces (and thus introduced more than fifty new works, forty among which were written by Slovenian composers) as well as three ballets. He collaborated as a conductor, permanent guest conductor, soloist and chamber musician with more than sixty different ensembles both at home and abroad (Italy, Austria, Germany, Hungary, Switzerland, France, Russia and all the states of former Yugoslavia). 

Aleksandar Spasić has been engaged as an Assistant Conductor by the Slovenian National Theatre Opera and Ballet Ljubljana since 1996. He has so far collaborated  in the following opera and ballet productions: The Troubadour, Nabucco, La Traviata, Don Pasquale, The Dead Eyes, Faust, Rusalka, The Equinox,  La Bohème, Lizistrata, Koschei the Deathless, Medea, L' armonia drammatica, The Bat, Papageno Plays the Magic Flute, The Merry Widow, The Turk in Italy, The Rhine Nixies, The Love for Three Oranges,  Don Quixote, Carmen, Prince Igor, Romeo and Juliet, The Sleeping Beauty,  The Firebird, A Midsummer Night's Dream, George Gershwin, Ana Karenina, Mozart vs. Schumann, The Barber of Seville, The Apothecary, The Impresario, The Marriage Contract, Visibleinvisible, La Sylphide, The Nutcracker, and many other productions. In 2011, he received the Gallus Commendation for his extraordinary achievement in music.