SAN JOSE — Northrop Grumman has decided to shut a San Jose plant in a downsizing that will eliminate 78 jobs and widen employment losses in the Bay Area’s tech sector, a new state government filing shows.

Employees at 6379 San Ignacio Ave. are part of the cuts by the aerospace manufacturer. Northrop Grumman Info Systems, a unit of Northrop Grumman that often provides information technology services to federal government agencies, operates at the site.

“Due to a program winddown and location consolidation effort, Northrop Grumman is closing its San Jose facility,” Michelle Cacho, a director of human resources with Northrop Grumman, wrote in a WARN letter to the state Employment Development Department.

The relevant program that was winding down wasn’t disclosed in the WARN letter.

“The company is closing the entire plant,” Northrop Grumman stated in the notice. “Because of the nature of this action, the employee separations are expected to be permanent.”

The EDD filing shows the layoffs are scheduled to occur in three stages: Oct. 31 of this year, and Jan. 29 and June 30, 2026.

It is possible some workers might continue employment at Northrop Grumman. Those affected by the cuts don’t have the right to bump employees with less seniority and a union doesn’t represent the employees.

“We are actively working with each employee to see if we can match them with opportunities across the company,” Northrop Grumman stated in the WARN letter regarding efforts that might reduce the total number of workers who ultimately lose their jobs.

The San Jose downsizing by Northrop Grumman arrives on the heels of a loss of 2,500 tech jobs in the Bay Area during July.

July also produced a loss of 6,700 tech jobs in California and 1,200 in the South Bay, according to seasonally adjusted estimates that Beacon Economics derived from a state Employment Development Department official monthly report.