Halangahu attended Daramalan College in Canberra before attending The King's School. He played in The King's School 1st XV rugby team in 2002, which won the GPS title that year.
In 2008, Halangahu was selected for Australia A to play in the Pacific Nations Cup.
Halangahu played 74 games for the Waratahs as a first-five or fullback to 2012, before spending three years playing in Italy and France.
He moved to New Zealand in 2015 to play for North Harbour and then took up an assistant coaching role with the province in 2016, where he has also been involved as a coaching educator.
The Australian, assisted Tom Coventry at North Harbour, will join him in making the jump to Super Rugby in 2019 as the Blues' Skills & Backs Coach.
In November 2020, Halangahu extended his stay with the Blues until 2021.
JW NOV 2020
|2019 - present|
|2012 - 2013|
|2006 - 2013|
|2013 - 2015|
|2014 - 2016|