ManTech International (NASDAQ:MANT) will be taking part in a Department of Homeland Security contract worth up to $6 billion, the Fairfax, Va.-based defense contractor announced Friday.

The contract, which calls for the provision of cyber-security services, including continuous diagnostics on the cyber-security of ".gov" websites, and response to attacks, will run for five years under a "blanket purchase agreement" -- essentially, an umbrella contract funding any number of purchases toward a single, broad goal.

Announcing the contract, ManTech Mission, Cyber, and Intelligence Solutions (MCIS) Group Chief Operating Officer L. William Varner noted that his company has "a unique set of tools and technologies that have proven to be successful over several years of protecting our nation's critical information resources." The company will be pitching these tools to the government as it competes to win individual "task orders" funded out of the overall $6 billion available under this contract, which has multiple awardees.

According to the Federal Times newspaper, the DHS contract includes a total of 17 separate awardees, including bigger defense contractors such as General Dynamics (NYSE:GD), Lockheed Martin (NYSE:NOC), Northrop Grumman (NYSE:NOC), and SAIC (UNKNOWN:SAI.DL).