Colin Leonard is an American mastering engineer. His credits include: Beyoncé, Bad Bunny, Justin Bieber, Jay-Z, Cardi B, Lil Baby, Lil Uzi Vert, Migos, Megan Thee Stallion, Mastodon, Paul McCartney, Dua Lipa and Gucci Mane to name a few. RIAA-certified sales and streams of albums and singles with Colin Leonard listed in the credits as a mastering engineer total over 600 million. His credits include 8 RIAA Diamond singles, 22 Billboard Top 200 #1s albums, 9 Billboard Hot 100 #1 singles and 11 Grammy nominations.