is a Canadian composer, producer, pianist, arranger, conductor and recording artist. He co-wrote and co-produced the two end credit songs for Fifty Shades of Grey and its soundtrack: "Earned It" (The Weeknd) and "I Know You" (Skylar Grey), with the former being nominated for Best R&B Song and Best Song Written For Visual Media at the 58th Annual Grammy Awards, and Best Original Song at the 88th Academy Awards. He also was a producer on the Weeknd's album Beauty Behind the Madness, which was nominated for Album Of The Year at the 58th Annual Grammy Awards.

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 also co-wrote Miley Cyrus' single "Wrecking Ball" from her 2013 studio album Bangerz. For the Vancouver 2010 Winter Olympics, Moccio co-wrote the theme song “I Believe” performed by Nikki Yanofsky.

He has collaborated with a diverse roster of artists including, Avril Lavigne, Seal, Dua Lipa, Ellie Goulding, Shaffer "Ne-Yo" Smith, James Blunt, Jason Derulo, Jamie Cullum, BeBe Winans, Jon Bellion, Paloma Faith, Jordan Smith, Fergie, Boi-1da, as a songwriter, musician and producer.