Twelve New Zealand Defence Force Personnel are fending off simulated cyber-attacks in the United States as part of training exercises.
They join around 2000 participants from the Five Eyes nations at a facility in Suffolk, Virginia.
"As the global ransomware attack in May has shown, no country is safe from cyber-attacks in our digitally interconnected world," joint forces acting commander Kevin McEvoy said.
"An effective cyber response is a team response. We need to partner with allied nations to defend our respective networks, so building good relationships through training is important."
Teams from Australia, Canada, New Zealand, the UK and the US are responding to the simulated attacks as a coalition force.
The exercises, called Exercise Cyber Guard and Exercise Cyber Flag, began in 2010 and New Zealand has attended for the past four years.