SAN JOSE — Two Silicon Valley tech titans have decided to chop jobs in Santa Clara County, according to a new cluster of state labor filings that sketched out plans for the combined elimination of more than 500 positions.

Cisco Systems has embarked on job cuts in San Jose and Milpitas, while Hitachi Vantara intends to eliminate jobs in Santa Clara, the new filings with the state’s Employment Development Department show.

The staffing reductions at Cisco went into effect as early as Feb. 26, and were scheduled to be completed by no later than early March, the networking giant told the EDD in two letters.

The job cutbacks at Hitachi Vantara were slated to occur on March 31 and April 30 of this year. Hitachi Vantara is a Santa Clara-based computer data storage unit of Tokyo, Japan-based Hitachi, a multinational conglomerate.

Between the two companies, the layoffs total 546, the EDD filings show.

Cisco eliminated 395 jobs, consisting of 224 at the company’s headquarters complex on West Tasman Drive in north San Jose and 171 at Cisco’s site at 560 McCarthy Blvd. in Milpitas.

“We regret to inform you that Cisco Systems will lay off certain employees” at company facilities in San Jose and Milpitas, the tech titan wrote in separate letters sent to the EDD and local political leaders in the two affected cities.

Hitachi Vantara eliminated 151 jobs in Santa Clara. Those consisted of 52 employees at the Hitachi Vantara headquarters at 2535 Augustine Drive at 99 people who work remotely, the company’s letter to the EDD stated.

“This action is expected to be permanent,” Hitachi Vantara legal director Katie Dix Elsner stated in a letter to the EDD and the other officials.

San Jose-based Cisco indicated that the layoffs it has conducted are also expected to be permanent.

Both companies stated that the displaced employees don’t have bumping rights, which means they won’t be able to displace other workers.

Neither Cisco nor Hitachi Vantara specified why they were undertaking employment reductions at this time.

However, Cisco did signal that the global economy in the early weeks of 2020 was affecting its financial results.

“We continued to see a more broad-based weakening in the global macroeconomic environment during the quarter which impacted our enterprise and commercial markets,” Cisco stated in a regulatory filing on Feb. 18 prior to when it disclosed the Silicon Valley layoffs to the EDD.

Plus, Cisco predicted in February that revenue during the current fiscal quarter slated to end in late April would produce a 1.5 percent to 3.5 percent decline in revenue. That’s on top of a 3.5 percent drop in revenue for the company’s second fiscal quarter that ended in late January.

“While the overall environment remains uncertain, we continue to aggressively invest in priority areas with the objective of driving profitable growth over the long term,” Cisco stated in its quarterly financial results that were released in February.