Both he and his wife, Marissa, are theater enthusiasts and producers who have been on the boards of several local theatre organizations and are invested in productions such as "Lend Me a Tenor" in London's West End and Tony award winning"Peter and the Starcatcher" on Broadway.
He also was in the cast of Lend Me a Tenor, Beauty and the Beast, A Class Act and the 1998 revival of The Sound of Music.
He appeared in January 2008 in a regional production (Northport, Long Island, New York) of Lend Me a Tenor.
tenor | tenor saxophone | Lend-Lease | John McCormack (tenor) | Lend Lease Group | Lend Me a Tenor | Fernando de la Mora (tenor) | Tenor saxophone | Tenor | James King (tenor) | Serenade for Tenor, Horn and Strings | Lend a Paw | Jimi Tenor | Carlo Bergonzi (tenor) | Andrew King (tenor) | Tenor Saxophone | Tenor Saw | Tenor guitar | Tenor drum | Serenade for tenor, horn and strings | Mario (tenor) | Lend Lease Project Management & Construction | Lend-lease | Lend, Austria | Kurt Huber (tenor) | John Elwes (tenor) | James Taylor (tenor) | Dennis O'Neill (tenor) | David Hobson (tenor) |
Siro was also sctive in the theatre, playing over 60 roles in his career, notably in Leo Tolstoi's Anna Karenina, Jean-Paul Sartre's The Respectful Prostitute, Tennessee Williams' A Streetcar Named Desire, Arthur Miller's A View From the Bridge, and Ken Ludwig's Lend Me a Tenor.