WASHINGTON โ€” Northrop Grumman Corp. of Los Angeles has agreed to sell its TASC consulting business, whose customers include the U.S. national security space community, for $1.65 billion to an investor group led by General Atlantic LLC and Kohlberg Kravis Roberts & Co., the companies announced Nov. 8

Chantilly, Va.-based TASC is a 43-year-old company that provides advisory services to the U.S. government for national security programs. Some one-third to one-half of the companyโ€™s business โ€” or about $500 million to $750 million in annual revenue โ€” is space related, according to an industry source.

The sale was driven by acquisition reform legislation passed this year that created stricter conflict-of-interest rules for companies, Northrop Grumman said. Northrop Grumman is a major prime contractor on U.S. military programs, including satellites and ground systems.

โ€œThis transaction is in the best interest of Northrop Grummanโ€™s customers, employees and shareholders,โ€ Ronald Sugar, the companyโ€™s chairman and chief executive, said in a company press release. โ€œIt reflects Northrop Grummanโ€™s desire to align quickly with the governmentโ€™s new organizational conflict of interest standards, while preserving TASCโ€™s unique organizational culture and its status as the advisory services employer of choice.

TASC employs 5,000 people and expects 2009 revenue of $1.6 billion. The sale, which is expected to be complete by the end of the year, is expected to generate $1.1 billion in cash for Northrop Grumman after taxes, which will be used to repurchase shares of the companyโ€™s common stock, the release said.

In a press release, General Atlantic, said its advisers on the deal included Donald Kerr, a former director of the U.S. National Reconnaissance Office; Peter Marino, former director of technical services for the CIA; R. Evans Hineman, a former senior intelligence official and former president of TASC; James Frey, also a former president of TASC; and Reuben Jeffery, former U.S. undersecretary of state for economic, energy and agricultural affairs.

The transaction is subject to approval by U.S. government regulators.

โ€œTodayโ€™s announcement is another major milestone in TASCโ€™s long history of leadership in serving the federal government and national security communities, and provides an exceptional foundation for our continued growth,โ€ Wood Parker, TASCโ€™s general manager and prospective president and chief executive, said in a prepared statement. โ€œAs a fully independent entity, TASC will expand its ability to solve the U.S. Governmentโ€™s most pressing technical challenges. Our singular focus, as always, will remain supporting the vital missions of our customers.โ€