Chevron Corp. is moving 800 jobs in the San Francisco Bay area to Texas.

The shift of about a quarter of the petroleum giant's San Ramon headquarters staff will take place over two years.

The San Francisco Chronicle says the employees, most of them in technical positions dealing with information and advanced energy technologies, will be transferred to Houston.

Chevron notified employees in an email on Thursday.

Chevron was founded in California in 1879.

San Ramon will remain Chevron's corporate headquarters, where there are currently about out 3,500 employees. Another 3,000 Chevron employees work elsewhere in the San Francisco Bay area, most of them at the company's refinery and technology center in Richmond.