Joseph Kirkland, better known by his stage name Diamond D is a hip hop producer and MC from the Bronx, New York City, and one of the founding members of legendary NY crew D.I.T.C. He started out as a DJ for Jazzy Jay back in the early 1980s and was at the same time perfecting his skills in beat making and turntablism, and together with rhyme partner Master Rob, he was one half of the group Ultimate Force. The group got signed by Jazzy Jay to Strong City and Diamond and Rob started recording their debut album, I'm Not Playin', in 1988 and released the 12-inch single with the same title, which spawned a buzz in the underground. The album was completed in 1990 but got caught up in label politics and was shelved until 2007 when it got released through Traffic Entertainment. One of the last songs recorded for the album was a Diamond D solo song where he actually picked up the mike for the first time. The song was called "The Best Kept Secret." As Ultimate Force dissolved, record executives got their eyes on the Bronx phenomenon, which eventually resulted in the release of Diamond's debut album Stunts, Blunts and Hip Hop (released under the moniker Diamond & the Psychotic Neurotics) in 1992. The album is considered to be one of the finest D.I.T.C. solo LPs and features early appearances from Big L and Fat Joe, the latter of whose 1993 debut album, Represent, was mainly produced by Diamond D.
In 1996, Diamond D appeared on the Red Hot Organization's compilation CD, America is Dying Slowly, alongside Biz Markie, Wu-Tang Clan, and Fat Joe, among many other prominent hip hop artists. The CD, meant to raise awareness of the AIDS epidemic among African American men, was heralded as "a masterpiece" by The Source magazine.
Diamond's second album, Hatred, Passions and Infidelity, was released in 1997 to mixed but mostly positive reviews. Following the release, Diamond established his name as a sought-after producer after providing impressive beats to hip-hop legends such as Busta Rhymes, Fugees, KRS-One, Queen Latifah, the Pharcyde, and Brand Nubian among others. Since then, he released the independent street album Grown-Man Talk, the official mixtape compilation The Diamond Mine, and provided contributions to his D.I.T.C. cohorts' projects including the crew's self-titled 2000 debut album on Tommy Boy/Warner Bros. Records.
In 2008 Diamond signed with Babygrande Records. His fourth album, titled The Huge Hefner Chronicles, was released in October 2008, and unlike previous efforts, the LP showed Diamond focus more on his rhymes as production was handled by other respected underground beat makers such as Nottz, DJ Scratch, Ill Mind, Def Jef, and Jesse West. Diamond said that he was releasing a second album on Babygrande sometime in 2009, as his contract was for two albums, although rumors say that Diamond is now signed to Duck Down Records.