Miles Edward O'Brien is a character in the Star Trek franchise. He
appears sporadically in all seven seasons of Star Trek: The Next
Generation and is a main cast member of Star Trek: Deep Space Nine.
O'Brien was originally the transporter chief of the USS Enterprise-D.
He was later promoted to chief of operations of Deep Space Nine.
O'Brien is the only major Star Trek character described as both
ethnically Irish and born in Ireland. O'Brien is portrayed by actor
Colm Meaney.According to Colm Meaney, at first O'Brien "was just
there, not really established as a character, and that went on for a
bit." He has a few lines in the pilot TNG episode, "Encounter at
Farpoint". Appearing on and off in subsequent episodes, mainly
operating the ship's transporters, it wasn't until the second-season
episode "Unnatural Selection" that Meaney's character was named, and
the second episode of season 4, "Family," before the character was
given a first name, and his personal life began to be developed.
However, Meaney came to like the arrangement of being hired on an
episode-by-episode basis, and was hesitant to sign on as a regular on
DS9. Along with Worf, Miles O'Brien is one of the two characters that
moved from TNG to be a main character on DS9.The backstory of the
character states that Miles O'Brien was born in Killarney, a town in
County Kerry in Ireland, Earth, in September 2328. He claims descent
from Brian Boru, the famous Ard Rí, or High King of Ireland (and
founder of the O'Brien Clan). His father, Michael O'Brien, wanted him
to play the cello, so he pursued this and was eventually accepted into
the Aldebaran Music Academy (revealed in DS9 episode "Shadowplay").
However, a few days before he was scheduled to start classes there, he
enlisted in Starfleet. O'Brien can also be seen playing the cello as
part of Data's string quartet early in the TNG episode "The Ensigns of
Command". In the DS9 episode "Invasive Procedures", it is revealed he
has two brothers. Miles O'Brien (Star Trek) Biography, NetWorth, Height, Age, Weight, Family, Married, Son, Daughter