FAIRFAX, Va. (CBSDC/AP) — One of Fairfax County’s largest employers is leaving, as Irving, Tex.-based Exxon Mobil Corp. says it is transferring about 2,000 employees from its northern Virginia offices to Houston.

Exxon Mobil’s Fairfax campus is a remnant from the days when Mobil Oil was headquartered in the county, before it merged with Exxon in 1999.

Fairfax County Economic Development Authority President Gerald Gordon declined to say Wednesday whether the county and state put together an incentive package seeking to retain the company. He said Exxon had been studying a campus consolidation for several years.

In a press release, ExxonMobil said the relocations will begin in 2014 and conclude by 2015.

The Fairfax campus has been headquarters for ExxonMobil’s refining operations. The campus now being built in Houston is expected to accommodate 10,000 employees.

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