 From 2000 to 2003, Estacio was Composer in Residence with the Calgary Philharmonic Orchestra and the Calgary Opera.He composed "Solaris" (2000), "Bootlegger’s Tarantella" (2001) and "Spring’s Promise" (2004) for the orchestra, and between 2001 and 2003 he wrote the opera "Filumena" (based on the life of Filumena Lassandro) with librettist John Murrell.Premiered in Calgary, the opera has been performed at the Banff Centre, Ottawa’s National Arts Centre, and by the Edmonton Opera, where it was filmed for television broadcast on the CBC television network.