The company marked the milestone on the day of provisional acceptance of Australia's most lethal warship, the Air Warfare Destroyer (AWD) Hobart.
Since its establishment in Australia in 1999, Raytheon Australia has contributed to the AWD program, the Collins Class submarine program and others.
Raytheon Australia's managing director Michael Ward said the company's workforce has helped achieve regionally superior capabilities for Australia.
"The combat system is what gives a submarine or surface ship its lethality and it is critical to the deterrent nature of Australia’s Defence assets – it’s what helps keep Australia safe and secure," said Ward.
"The 10 million hours of combat system integration, architecture, development and testing we’ve dedicated to critical Australian defence programs has delivered real outcomes for the Australian Defence Force.
"The success of our combat system integration activity is a source of tremendous pride for Raytheon Australia. Not only have we performed admirably on the programs we have been involved with but we have built for Australia a national asset in combat system integration."
Raytheon Australia was established as a full subsidiary of Raytheon Company of the US in 1999 in response to the Howard government’s defence industry policy.
The company now has over 500 people in its Australian combat system workforce.