Lockheed Martin is the nation's top weapons supplies, and the Newtown facility tests and builds satellites.
However, the company is scaling back because of declining demand from its biggest customer, the Department of Defense.
The company is cutting 4,000 jobs nationwide. Bucks County is losing 1,050 of those jobs. Of those, 800 employees will be out of work, while the rest are being transferred to Denver.
The news hits home not just for the workers but for the schools, businesses and neighbors who are trying to figure out what to do next.
At Joey G's Deli, the usual joking conversations have turned serious.
"You never really think it's going to be your back door," said Joseph Garvey of Joey G's.
The Lockheed plant is right around from Garvey's deli.
"We feed 75 to 100 of those folks a day. We're pretty taken aback by it," said Garvey.
For township officials, it's not just about the jobs. Their first priority is trying to figure out a way to help the employee - who are also their neighbors.
"I've already talked with the executives. We're working on trying to help them with placement, job retraining, whatever we can do," said Newtown Township Supervisor Ryan Gallagher.
Gallagher said while there is no question the closure will impact the township, he is optimistic about the future.
"We're financially stable enough to absorb the impact," he said.
Officials are already searching for a company to fill the space, but there is still some time. Lockheed plans to begin transferring work to its Denver facility over the next 12 to 18 months.