Randy Merrill is an American mastering engineer who has worked with international artists including Blink-182, DAY6, Lady Gaga, Charli XCX, Kesha, Katy Perry, Maroon 5, Harry Styles, One Direction, Adele, Imagine Dragons, Beck, Liam Gallagher, Jonas Brothers, Muse, Cage the Elephant, Maren Morris, Ariana Grande, Mumford & Sons, Paul McCartney, Troye Sivan, Taylor Swift, Lorde, Justin Bieber, Porter Robinson, Chappell Roan, Ayumi Hamasaki, Buck-Tick, King Gnu, Little Mix, BTS and Selena.

Merrill attended Jamestown Community College before graduating from State University of New York at Fredonia with a degree in Sound Recording Technology. He then became a mastering engineer at Masterdisk in 2008 before moving to Sterling Sound in 2013. At Sterling, Merrill worked alongside Tom Coyne winning four Grammys, including wins for Adele's 25, and Mark Ronson's "Uptown Funk". Merrill's mastering work would go on to win Grammys independently for Beck's Colors, Ariana Grande's Sweetener, Lady Gaga's "Shallow", and Cage the Elephant's Social Cues.

Merrill currently works out of Sterling Sound in Edgewater, New Jersey.