MK hit number-one on the US Billboard Hot Dance Music/Club Play chart in 1993 and 1994 with the songs Always and Love Changes. Lead vocals on both of those tracks were performed by Alana Simon (songs were credited to MK featuring Alana). The combo also recorded the underground house music classic anthem Burning. Always peaked at number 69 on the UK Singles Chart in February 1995. MK also hit the dance chart with "4 You", using the pseudonym 4th Measure Men. In November 2013, his remix of Storm Queen's song Look Right Through was released on Defected Records and Warner Music and reached number-one on the UK Singles Chart.
Aside from his own career as a recording artist, he is also known for the remixes he produced for other artists, such as Celine Dion's single Misled, which became the first (and only) number-one Billboard Dance/Club Play chart hit of Dion's career. His remixes of Betty Boo's single Thing Goin' On brought the song to number five on the same chart. His remixes of The Message by Sofia Shinas reached number 20 on the Dance/Club Play chart. He also produced the remixes of Jody Watley's single Your Love Keeps Working On Me, which reached number two on that chart.
Latest remixes and productions include Lana Del Rey, Dev, Enrique Iglesias, Sky Ferreira, Ellie Goulding, Jamie Jones, Lee Foss, and Tricky. Kinchen is responsible for the iconic remix of the Nightcrawlers' record Push the Feeling On, which was used almost twenty years later as the basis of Pitbull's global hit record Hotel Room Service. The remix was successful internationally, becoming a major number three UK hit. He also assisted Nightcrawlers front-man John Reid with a number of his further releases, but they did not have the same impact on the charts.
In 2002, Kinchen became an in-house producer for actor and singer Will Smith. Kinchen then worked on Shark's Tale, did production on one of Will Smith's albums, and did the music of the TV show All of Us, which was produced by Smith. Marc Kinchen is also producing for Willow and Jaden Smith with his production partner and other half of Stoopid Robots, Omarr Rambert. Kinchen worked on projects with Diane Warren and Pitbull. Kinchen worked with Pitbull as a producer and produced three songs on the latter's Armando album (2010), two songs on the Planet Pit album (2011), and co-produced the theme song for Men in Black 3, Back in Time by Pitbull. Kinchen also produced music in collaboration with Blinded in March 2014. In the same year, British DJ Route 94 remixed Kinchen's track Always, which went on to peak at number 12 on the UK Singles Chart.