Born in Las Vegas, Nevada,[1][2] Guerrero was inspired to sing after hearing a rendition by a seminary choir of John Rutter's The Lord bless you and keep you.
[1][4] During his time with the former, he was asked to step into the lead role of Count Almaviva in a production of The Ghosts of Versailles, after another tenor withdrew one week before rehearsals started.
[4] In October 2019, he appeared in Germany for the first time, at the Oper Frankfurt as Des Grieux in Puccini's Manon Lescaut alongside Asmik Grigorian in the title role.
[1][6] A review noted that his voice was both beautifully mellow and strikingly powerful, even in the high register ("... schönstem Tenorschmelz und markant kräftiger Stimmgebung auch in den Höhen"), and his acting like a Latin lover.
[2] In concert, Guerrero sang the tenor solo in Beethoven's Ninth Symphony with the Simón Bolivar Orchestra conducted by Gustavo Dudamel while touring Europe.