Miles O'Brien
- Full Name: Miles Edward O'Brien
- Born: September 2328, Ireland, Earth (DS9: "Whispers")
- Species: Human
- Gender: Male
- Father: Michael O'Brien (TNG: "Disaster")
- Wife: Keiko Ishikawa (2367 - Present)
- Daughter: Molly O'Brien
- Son: Kirayoshi O'Brien
- By 2362: Petty officer, tactical specialist, Starfleet; USS Rutledge (DS9: "Tribunal")
- December 2363: Chief petty officer, relief alpha shift conn officer, Starfleet; USS Enterprise (NCC-1701-D)] (TNG Novel: The Buried Age)
- Also occasionally served in security division as security guard
- By 2365: Chief petty officer, transporter chief, Starfleet; USS Enterprise (NCC-1701-D)] (TNG Novel: The Buried Age)
- May 19, 2369: Senior chief petty officer, chief of operations, Starfleet; Deep Space 9 (DS9: "Emissary")
- December 2375: Senior chief petty officer, instructor, Starfleet; Starfleet Academy (DS9: "What You Leave Behind")