More than two-thirds of 11,000 new technology jobs to be created in Virginia will be in the Washington suburbs, mostly in Fairfax County, Gov. Mark R. Warner (D) said yesterday.

Warner said the planned expansions will create high-end information technology jobs over the next five years paying an average of $76,000 annually. The jobs will be added by Booz Allen Hamilton Inc., Science Applications International Corp., SRA International Inc., and PricewaterhouseCoopers.

Virginia economic development officials gave Booz Allen a $9 million grant that they said the company will collect after the last of the 4,600 workers is hired. Each company also will qualify for job-training funding from the state and a $1,000 tax credit for each new job, said Jill Vaughan, spokeswoman for the Virginia Economic Development Partnership.

"These are the kind of cornerstones of the 21st century economy we are building here in Virginia," Warner said at a ceremony formally announcing the expansion plans. He spoke at Booz Allen's new Herndon campus, where most of the 4,600 added employees of the management consulting firm will work.

Growth in federal government contracts, particularly in the homeland security and defense sectors, is driving the expansions, which also will include new jobs in Charlottesville and Hampton Roads, economic development officials said.

The new hires at Booz Allen over five years will make the McLean company the largest private employer in Fairfax County, with more than 12,000 positions in the county, officials said.

SAIC, a San Diego-based research and engineering firm, will add 4,515 jobs in Virginia, including 2,900 at its growing campus in McLean. SRA of Fairfax, which specializes in information technology, will create 1,400 new jobs in Fairfax and Arlington. And PricewaterhouseCoopers, the accounting giant, will hire 600 new workers in McLean.

Warner contrasted the jobs, at "long-term, stable companies that are going to be here for years to come," with the workforces of the start-up companies that folded when the dot-com bubble burst.

"Many people who will take these jobs are people who worked at Internet companies a few years ago," said Warner, a former venture capitalist in Northern Virginia.