John O'Callaghan (musician)

This biography of a living person needs additional citations for verification. Please help by adding reliable sources. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately from the article and its talk page, especially if potentially libelous. Find sources: "John O'Callaghan" musician – news · newspapers · books · scholar · JSTOR (September 2020) (Learn how and when to remove this message)

John O'Callaghan
O'Callaghan in Moscow, 2010
Background information
Also known as	Joint Operations Centre, Mannix, Henrik Zuberstein
Born	1981 (age 42–43)[citation needed]
Origin	Navan, Ireland
Genres	Trance
Years active	2003–present
Labels	Subculture Armada Music
Website	johnocallaghan.net

John O'Callaghan (born 1981) is an Irish musician and DJ, who mainly produces trance music.^[1] He also produces music under the aliases of Joint Operations Centre, Mannix, Henrik Zuberstein, and Stenna. He has 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 tracks are "Exactly" with Bryan Kearney, "Big Sky", in collaboration with vocalist Audrey Gallagher, and "Find Yourself" (feat. Sarah Howells). 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.^[2]