The Defense Department said Monday Northrop will design, develop and implement airborne electronic attack requirements in support of EA-18G aircraft under the modification.
The modification combines purchases for the Navy worth $83.8 million and the Australian government, through a foreign military sales deal, valued at $7.3 million.
Work will occur in Point Mugu, California through July 2019.
The Naval Air Warfare Centers weapons division will obligate $1.3 million at the time of award from the Navys fiscal 2017 research, development, test and evaluation funds.