John O'Callaghan (musician)

John O'Callaghan
O'Callaghan in Moscow, 2010
Background information
Also known as	Joint Operations Centre, Mannix, Henrik Zuberstein
Origin	Navan, Ireland
Genres	Trance
Years active	2003-present
Labels	Subculture Armada Music
Website	http://www.johnocallaghan.net
Notable instruments
Steinberg Cubase

John O'Callaghan is an Irish musician and DJ, mainly producing trance music. He also produces music under the alias of Joint Operations Centre, Mannix, Henrik Zuberstein and Stenna. He has also collaborated with fellow Discover artists such as Bryan Kearney, Neal Scarborough (as Inertia), Thomas Bronzwaer (as Lost World) and Greg Downey as well as more recently, trance hero Leon Bolier. His best known track is Big Sky, done with vocalist Audrey Gallagher. Callaghan has received remixes by trance artists such as The Thrillseekers, Sean Tyas, Gareth Emery, Cosmic Gate, Markus Schulz and Indecent Noise. He has also worked with Heatbeat and Aly & Fila.

John O'Callaghan formerly had the majority of his work released on Discover, the British record label set up by John Askew. Recently, his work has been released by Armada Music and its sublabels; primarily on Armind and Soundpiercing. The remix of his vocal trance production "Big Sky" by Agnelli & Nelson was voted "Tune of The Year" by listeners of Armin van Buuren's A State of Trance radio show in 2007.

In 2008, not only did John enter the DJ Mag 100 at number 60 but he also picked up two awards at the Irish Dance Music Awards, winning Best Producer and Best DJ. With the success of 2008 flowing, John also became the first Irishman to play Trance Energy. In 2009, he rose 36 places to 24th in the DJ Mag 100.

In addition to numerous single releases, he has released a live album (Discover "Live As" Volume 2) and two artist albums, Something To Live For and Never Fade Away.