"The criminal actions of this corporation had threatened to turn on the lights on the modern battlefield for our enemies and expose American soldiers to great harm," Brownlee said.
ITT defense-related technical data was given to China, Singapore and the United Kingdom in order to cut costs, government investigators said.
"Placing profits ahead of the security of our nation is simply not acceptable for any corporation," Homeland Security Assistant Secretary Julie Myers said in a statement.
ITT, which Brownlee said is the U.S. military's 12th largest systems supplier, is the first major defense contractor convicted of a criminal violation under the Arms Export Control Act that a Brownlee spokesman said was passed in 1976.
According to the prosecutor, ITT agreed to pay a $2 million criminal fine, forfeit $28 million in illegal proceeds to the U.S. government and pay $20 million to the State Department.
"ITT will pay $50 million in restitution to the victims of their crimes _ the American soldier," Brownlee said.
The fine will be suspended for five years and the White Plains, N.Y.-based company can reduce it dollar-for-dollar by investing in the development and production of more advanced night-vision technology so the U.S. military maintains battlefield advantage.
The government will maintain the rights to any technologies ITT develops and can share them with rival defense firms bidding on future contracts, Brownlee said.