Starfleet engineer Miles O'Brien married Keiko Ishikawa in 2366. They have two children, daughter Molly O'Brien born in 2367, and son Kirayoshi O'Brien born in 2373. O'Brien enjoys the holonovel "Battle of Britain", racquetball, darts and kayaking. He also plays the cello. His father, Michael O'Brien, wanted him to be a concert cellist, however Miles joined Starfleet two days before entering the Aldeberan Music Academy.

Starfleet History
Has been decorated 16 times.
2346 Enlisted in Starfleet as a non-commissioned officer.
2347 Posted to U.S.S. Rutledge NCC-57295. Transporter specialist.
2347 U.S.S. Rutledge responded to Cardassian massacre on Setlik III Federation outpost.
2347-2362 U.S.S. Rutledge NCC-57295, tactical officer.
2364 Posted to U.S.S. Enterprise NCC-1701-D.
2364 Assigned to Enterprise-D Transporter Chief.
2369 Promoted to Chief of Operations, station Deep Space Nine.
2370 Arrested by the Cardassians and put on trial for Maquis crimes. Charges were dismissed when Odo and Captain Sisko found the Cardassians planted evidence.
2371 Assigned as Chief Engineer of U.S.S. Defiant NX-74205.
2373 Participated in covert mission to expose Klingon leader as a changeling.
2374 Served on U.S.S. Defiant NX-74205 during Federation/Klingon Task Force against the Dominion.
2374 Participated in a successful covert mission to destroy a Cardassian/Dominion ketracel-white depot.

Miles O'Brien was first seen in "Encounter at Farpoint" (TNG).