ManTech International [MANT] yesterday said that it has agreed to acquire Emerging Technologies Group (ETG), a woman-owned, service disabled veteran owned small business specializing in computer forensics and network analysis.

Terms of the acquisition, which is expected to close in the third quarter of 2008, were not disclosed. ManTech said the deal should be accretive to earnings this year and will add about $20 million to sales in 2009 with solid operating margins.

“This acquisition adds further breadth to ManTech in the high-end intelligence arena and strengthens our position as a leader in cyber security,” George Pedersen, ManTech’s chairman and CEO, said in a statement. Robert Coleman, the company’s president, said the transaction will enable ManTech to capture more work on the potential multi-billion dollar Comprehensive National Cyber Initiative, which the company believes will be a growth area.

ETG is based in Northern Virginia. All of the company’s employees have high-level security clearances. The company has expertise in Signals Intelligence and Communications Intelligence analysis supporting the counter-terrorism and counter-intelligence missions around the world. ETG serves the intelligence community, DoD, law enforcement and commercial sectors.

ManTech said the deal will give it new customers in the intelligence community and new capabilities in cyber security.

ETG’s facilities include a 10,000 square foot computer forensics facility and a 3,500 square foot accredited Sensitive Compartmented Information Facility for the storage and processing of classified information on site.

ETG’s financial advisor was Jefferies Quarterdeck.