"What we have learned is the incredible impact that improved mindset and confidence can cause when you get in behind the owners, leaders and founders of Kiwi businesses to help them realise their potential."
Under Hamilton's reign The Icehouse - which is owned by not-for-profit charity The International Centre for Entrepreneurship Foundation - has helped businesses grow revenue by $15.5 billion of which $3.7 billion has come from international markets and create more than 27,000 jobs.
It has focused on helping privately owned businesses and high tech, high-value start-ups expanding its support into the regions through a partnership in the Hawke's Bay and will establish operations in the Bay of Plenty later this year.
"Since 2001, we have built our ecosystem on partnership and interdependence. From our founding group of partners including the University of Auckland Business School and the BNZ, to our facilitators, coaches, advisors and investors – all focused on enabling Kiwi business owners and founders to reach their potential.
"It is an extraordinary resource for generations in the future to build on."
Icehouse chair Chris Quin said Hamilton had made an "exceptional impact" on the New Zealand business community.
The board will begin recruiting for a new chief executive next month and will transition the next candidate in with Hamilton's help.