Raytheon [RTN] said it has received an initial contract to provide engineering services related to a U.S. government Foreign Military Sale of the Patriot air and missile defense system to South Korea.

Raytheon expects significant follow-on awards to complete the system integration and to provide command and control, communications and maintenance support equipment, as well as the training of Korean operators and maintainers and technical assistance to the deployed systems.

“There is a strong continuing demand, both domestically and internationally, for the combat-proven Patriot system,” Joseph “Skip” Garrett, deputy of Patriot Programs for Raytheon Integrated Defense Systems, said. “Our Patriot systems will provide South Korea the capability to defend itself from the full spectrum of air and missile threats.”

Raytheon is the prime contractor to the U.S. government for this Foreign Military Sales program, which is called SAM-X by South Korea.

The engineering services contract calls for Raytheon to perform preliminary planning and program development efforts for the integration of Patriot Fire Units into South Korea’s national command and control structure.