[2] Moccio co-wrote Celine Dion's hit "A New Day Has Come" with Aldo Nova, which reached and held the number one spot on the Billboard AC Chart for a record-breaking 21 weeks.
He has collaborated with a diverse roster of artists including Avril Lavigne and Andrea Bocelli as a songwriter, musician and producer.
During the early years of his tenure at Sony/ATV, Moccio worked as a session musician, in-house producer, arranger and composer, attending rehearsals of the Toronto Symphony Orchestra, and playing in Toronto jazz clubs and hotel lounges, notably the Four Seasons Hotel's La Serre.
Throughout his nearly 9-year tenure at Sony/ATV, Moccio wrote for several award-winning Canadian and international artists, most notably Celine Dion, Sarah Brightman, and Josh Groban.
Moccio spent many months in writing sessions in Nashville, Los Angeles, and New York during these years, which culminated in a lengthy catalogue of songs as musician, songwriter, producer and composer.
The same version achieved #1 status on iTunes Canada and Billboard's Canadian Hot 100 for 4 straight weeks in February 2010.
In June 2019, Moccio was honoured by the University of Western Ontario with a Doctor of Music, honoris causa (DMus) degree.