"Kurt Campbell has been the day-to-day manager of US relations with New Zealand and with our Pacific neighbours. He has brought huge energy and skill to this role, and has played an indispensable role in the many positive developments in the NZ/US relationship on Secretary Clinton's watch," said Mr McCully.
Mrs Clinton formally resigned from the role ending her four-year tenure that saw her shatter record for the number of countries visited.
Mr McCully also congratulated John Kerry on being sworn in as the new Secretary of State.
Secretary Kerry brings a wealth of experience to the role and has a strong appreciation for the Asia-Pacific region. I have no doubt we will work together to further strengthen NZ-US ties.