[1] From both his solo work and as part of the production duo the Underdogs, he has been credited on releases for artists including Aretha Franklin, Michael Jackson, Beyoncé, Whitney Houston, Justin Bieber, and Ariana Grande.

[3] As a child, Harvey moved with his family to Los Angeles and followed his father to many recording sessions with such greats as Quincy Jones, the Brothers Johnson and Herbie Hancock.

He also worked with Mason Sr.'s group Fourplay, In 1998 he produced the track called "Sexual Healing" featuring El DeBarge in 1998.

[7] Mason jr. then worked with Jerkins over the next three years on projects including "Say My Name" by Destiny's Child, "It's Not Right, But It's Okay" by Whitney Houston, and "He Wasn't Man Enough" by Toni Braxton.

The Underdogs produced R&B and pop hits such "How You Gonna Act Like That" also by the singer, as well as "Gots Ta Be" by B2K, "O" by Omarion, "More To Life" by Stacie Orrico, "Sorry 2004" by Ruben Studdard, and "No Air" by Jordin Sparks and Chris Brown.

Alongside Tricky Stewart and Stargate, respectively, Mason produced the title track and a cover of "Song for You" for Whitney Houston's 2009 album, I Look to You.

[18] In 2010, Mason produced the cover version of "One Shining Moment" featuring Jennifer Hudson for CBS Sports' Final Four.

[24] Harvey Mason Media, in tandem with Polow da Don's Zone 4 and Interscope Records, produced the accompanying soundtrack album, Music Inspired by More Than a Game, which was supported by Drake, Lil Wayne, Kanye West and Eminem's collaborative single, "Forever".

Following the success of Pitch Perfect 2, Get On Up, and Straight Outta Compton, Harvey was music producer for the NBC broadcast of The Wiz Live!, which aired on December 3, 2015.

[26] In 2017, Mason jr. was executive musical producer for Pitch Perfect 3 – the final installment of the Universal Pictures series, as well as the musical reworking of the 1980s classic Valley Girl for MGM, and USA Network's Unsolved, a scripted true crime series based on the murder investigations of Tupac Shakur and Notorious B.I.G..

Furthermore, Mason also helmed a sinilar role, as well as composer on Anthony Mandler's feature debut Monster which was nominated for the 2018 Grand Jury Prize at Sundance.

[28] Mason jr. produced the music for NBC's Jesus Christ Superstar Live in Concert!, which aired on April 1, 2018,[29] as well as Bad Times at the El Royale for 20th Century Fox, directed by Drew Goddard.