Brandon Michael Green (born July 23, 1988), known professionally as Maejor (formerly Bei Maejor and later Maejor Ali), is an American record producer, songwriter, and singer. Green is known for having produced and written songs for prominent music industry artists—most extensively Canadian singer Justin Bieber. He is one half of the EDM duo Area21, which he formed with Dutch DJ Martin Garrix in 2016.

As an R&B recording artist, Green initially signed with Jive Records to release two singles—"Trouble" (featuring J. Cole) in 2011 and "Lights Down Low" (featuring Waka Flocka Flame) the following year—that yielded mild success on the Hot R&B/Hip-Hop Songs charts. He then departed the label was led by Bieber to sign with Def Jam Recordings, where he found brief commercial success with his 2013 single "Lolly" (featuring Juicy J and Justin Bieber). The song peaked at number 19 on the Billboard Hot 100, although its follow-ups failed to chart, prolonging the release of his major label debut album. He then signed with Virgin EMI Records in 2018 to release singles which shifted further into EDM and world music, tuned in scientific pitches and frequencies. His debut studio album, Vol. 1: Frequencies (2020) was claimed by Green to contain "healing frequencies."

In addition to producing music for national campaigns including Pepsi and the Boston Celtics, Green has also contributed to the film soundtracks for Bratz: The Movie (2007), The Princess and the Frog (2009) and Think Like a Man (2012), as well as the video game music for NBA 2K and FIFA. He has received a Grammy Award nomination.