Prime Minister John Key will attend the fourth and final Nuclear Security Summit in Washington next week.
He said the summit was an opportunity to address nuclear terrorism threats at the global level.
Mr Key said, since the first summit in 2010, New Zealand had contributed more than $4 million to international projects to strengthen nuclear security.
While in Washington, Mr Key will also meet senior members of US President Barack Obama's Cabinet to discuss trade and economic issues and will give a speech to the United States Chamber of Commerce.
