ManTech International has signed a definitive agreement to acquire Sensor Technologies (STI) for $242m in cash.

STI is a provider of systems engineering and command, control, communications, computers, intelligence, surveillance and reconnaissance (C4ISR) services to the Department of Defense, with services supporting program management offices across the US army in the areas of biometrics, human terrain systems, communications, and ISR.

George Pedersen, chairman of the board and chief executive officer of ManTech International, said: This acquisition is consistent with our long-term strategy to broaden our footprint in the high-end defense and intelligence market. STI is an outstanding company with a proven track record of strong growth, profitability and excellence in supporting their customers.

“With the defense appropriation bill on track and a clear mission and strategy for Afghanistan, this acquisition allows us to provide more direct support to the U.S. Army as it continues its overseas operations and prepares for the next generation of national security.”

The acquisition is subject to various closing conditions and approvals, including approval under the Hart-Scott-Rodino Act, and is expected to be completed early in 2010.