John O'Callaghan is an Irish DJ, musician, producer, and remixer born on September 24, 1982. Specializing in electronic and trance music, he is also known by aliases such as Joint Operations Centre, Mannix, and Stenna. One of his most notable tracks is "Big Sky", a collaboration with vocalist Audrey Gallagher. Over the years, John O'Callaghan has become a prominent figure in the trance music scene, contributing to its evolution with his innovative productions and remixes. His work continues to influence the genre globally.

• Genres: Электроника, Танцевальная музыка, Транс
• Country: Ireland
• Language: English
• Official website: johnocallaghan.net