For Immediate Release

November 13, 2001

PEC Solutions Hosts Groundbreaking Ceremony for New Office Building

Facility will Consolidate PEC's Three-building Technology Campus

Fairfax, Va.— At a groundbreaking ceremony on October 26, 2001, PEC Solutions kicked off construction for a new building that will complete the company's three-building Technology Campus in Fairfax, Virginia.

Fueled by PEC's 16 years of growth in the Washington area, the building represents the final phase of a planned consolidation of PEC's Fairfax operations into a three-building technology campus in the Fair Lakes section of Fairfax County, Virginia. With its convenient location, the new facility will provide easy access to commuter arteries, airports, and clients in the Washington, DC metropolitan area.

Approximately 150,000 square feet in size, the building will have a capacity of 1,000 employees. The facility will feature six floors, two conference rooms, an auditorium, and will also include a four-level parking structure. Located adjacent to PEC's current corporate headquarters, the building is expected to be occupied by December 1, 2002.

"We are pleased to have broken ground on this new facility," said Dr. David Karlgaard, President and CEO of PEC Solutions. "This expansion is the result of our company's 16 years of success in the Washington, DC, and national high-tech market. This construction is the final phase of a planned consolidation of our Fairfax operations into a three-building technology campus that offers our staff a top-rate facility in a premier location. It will also enhance our recruiting and retention efforts, help us better serve our clients, and will support future growth."

Congressman Tom Davis, who spoke at the groundbreaking ceremony, noted that PEC Solutions "is the premier Web-enabler for government [and] a Fairfax success story…We're just really proud to have them here."

Others participating in the groundbreaking ceremony included:

• Congressman Frank Wolf
• Katherine K. Hanley, Chairman, Fairfax County Board of Supervisors
• Elaine McConnell, Supervisor, Springfield District, Fairfax County Board of Supervisors
• William C. Smith, Senior Vice President, The Peterson Companies
• Milton V. Peterson, Principal, The Peterson Companies.

Jim Wright of CB Richard Ellis, who specializes in build-to-suit transactions, served as the real estate broker in the agreement.

Fair Lakes is a development of The Peterson Companies and its predecessor Hazel/Peterson Companies, which will develop, own and manage PEC's new building.

About CB Richard Ellis
CB Richard Ellis is the world's leading real estate services company. Headquartered in Los Angeles with 10,000 employees worldwide, the company serves real estate owners, investors and occupiers through nearly 250 principal offices in 45 countries. Services include property sales and leasing, property management, corporate services and facilities management, mortgage banking, investment management, capital markets, appraisal/valuation, research and consulting.

About The Peterson Companies
The Peterson Companies and its affiliates have had a major impact on the Washington, D.C. area's real estate development industry since the early 1970's. Based in Fairfax, Virginia, The Peterson Companies is one of the largest privately-owned development companies in the region, a company with vast experience in every aspect of real estate development — acquisition, planning and zoning, community development, office and retail construction, and property management.

About PEC Solutions
Solutions is a professional services firm that helps government clients harness the power of the Internet and other advanced technologies to improve mission performance. The company specializes in Web-Enabling Government® by providing secure, interoperable technology solutions for clients in law enforcement, intelligence, defense, and civilian agencies within the Federal Government and at State and local levels. PEC Solutions is based in Fairfax County, Virginia, with offices around the United States. Visit the company on the Web at www.pec.com.

For more information, contact John McNeilly, PEC Solutions Manager of Corporate Communications and Investor Relations, at 703-679-4900.

Special Note: This press release may contain forward-looking information within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, and is subject to the safe harbor created by those sections. PEC Solutions assumes no obligation to update the information contained in this press release. PEC Solutions' future results may be affected by its ability to continue to implement its eGovernment solutions, its dependence on the federal government and other federal government contractors as its major customers, its dependence on procuring, pricing and performing short-term government contracts, its dependence on hiring and retaining qualified professionals, potential fluctuations in its quarterly operating results, its dependence on certain key employees and its ability to timely and effectively integrate the businesses it may acquire.