Three years later he became director of the ensemble I Barocchisti [de], recording with them several works by Bach, George Frideric Handel and Antonio Vivaldi.
His recording of Handel's Faramondo was acclaimed by critics; Margarida Mota-Bull noted that "I Barocchisti and the Coro della Radio Svizzera under the excellent direction of Diego Fasolis deliver a remarkably well-judged and restrained interpretation of this opera by Handel",[2] and Tim Ashley wrote in The Guardian: "A cool, brilliant operatic game, it's devastatingly realised by Diego Fasolis and I Barocchisti".
[4] Fasolis made his debut as conductor at the Salzburg Pentecost Festival [de] with a revival of Niccolò Jommelli's oratorio Isacco figura del Redentore in 2013.
[6] Staged by Eva Höckmayr, he conducted the Akademie für Alte Musik, with Anna Prohaska as Poppea, Max Emanuel Cencic as Nerone and Mark Milhofer as Arnalta.
He has collaborated regularly with singers such as Philippe Jaroussky, Max Emanuel Cenčić, Cecilia Bartoli, and the recorder player Maurice Steger.