Other contracts were awarded to Science Application International, Ametek AMT, Target Instruments, and Smiths Detection.
The nuclear detection office anticipates purchasing and deploying about 1,000 handheld systems and 200 backpack systems through the program. There are more than 14,000 handheld devices already in use.
"The portable technology will be used primarily by U.S. Customs and Border Protection officers for secondary screening of cargo to identify and localize radiological material after a primary alarm has been triggered," the nuclear detection office said in a statement.