. O'Brien made his debut for the national side in March 2005 following injuries to senior international players, such as
Shane Bond,
Daryl Tuffey and
Chris Martin but has been in and out of the side since to replace injured and retired players. He made his
One Day International debut against the England cricket team, and had a tough debut, with figures of 1/59 in 6 overs. However, between 2007 and 2009 he established himself in the Test side, and to a lesser extent, in the ODI side, particularly in the absence of
Shane Bond. He was renowned as an 'into-the-wind' bowler who would often bowl at an end that did not offer favourable bowling conditions, especially at the
Basin Reserve in
Wellington, a ground renowned for strong winds. He enjoyed much success as a fast bowler for the Black Caps, with great performances against
England in the UK, and against the
West Indies cricket team at home, where he took his best Test figures of 6/75, in a spell of bowling regarded as one of the best in New Zealand. These performance have given him the reputation as a wicket-taking bowler, and being the
go-to man for
Daniel Vettori, the captain. He continued his consistent spells against the
Australia cricket team, home and away, and for Wellington. During New Zealand's tour of England in 2008, he had had similar success, taking 15 wickets at 26.80. Against the
Pakistan cricket team at home in December 2009, he has become well known for bowling New Zealand to victory by taking 3 wickets while suffering from a broken thumb. In this same series, he took 6 wickets in the next game, including 4/66, dismissing the likes of
Salman Butt,
Imran Farhat and
Misbah-ul-Haq. In December 2009, he announced his decision to retire from international cricket to spend more time with his wife in England and this decision prompted
Middlesex to sign O'Brien as their overseas player for the 2010 season. == Domestic career==