He joined the coaching setup in 2004 when he served as an assistant to Graham Henry.
The All Blacks now hold all the major trophies we play for, he played a critical role in the back-to-back-Rugby World Cup victories in 2011 and 2015, and we wish him and the team all the very best for next year's campaign.
"I'm finishing", Hansen said.
"This is a critical process which shouldn't be rushed and shouldn't be made in the turbulent period that tends to follow a Rugby World Cup campaign", he said.
With Hansen in charge, the All Blacks have posted 85 Test victories, eight losses and three draws, a win rate of nearly 90 percent.
We'll be attempting to do something that has never been done before - to win three consecutive Rugby World Cups.
She also scooped the Women's Player of the Year award for her contribution to the Black Ferns this season, as well as Fiao'o Faamausili Medal for her role in Canterbury's Cup success.
Hansen's decision could lead to Joe Schmidt taking over as New Zealand coach. "When it does, you have to have a really good look at it", said Robertson, who oversaw New Zealand's 2015 World Rugby Under-20 Championship triumph.
He is to leave the Ireland job after the World Cup, like England coach Eddie Jones and Wales boss Warren Gatland will do also. "The All Blacks now hold all the major trophies we play for, he played a critical role in the back-to-back World Cup victories in 2011 and 2015, and we wish him and the team all the very best for next year's campaign".
"It is probably going to be the toughest World Cup. from a competitive point of view".
All Blacks coach Steve Hansen will step down in 2019.
He took over the top job in Cardiff in 2002 but had mixed results before returning to New Zealand two years later to again work as Henry's offsider, this time with the All Blacks.
Hansen said he had not thought about his future beyond the next 12 months.
"I remember the first time I watched the All Blacks after I left", he said.
Mo'unga was voted Super Rugby Player of the Year and teammate Taylor the Maori Player of the Year.