ManTech has signed a definitive agreement to acquire the business of HBGary.

A provider of technologies and solutions for mission-critical national security programs for government departments, ManTech said the deal for its competitor is expected to be completed in March.

HBGary, which was noted for a major attack on its network last year, is a provider of software products to detect, analyse and diagnose advanced persistent threats (APTs) and targeted malware.

L. William Varner, president and chief operating officer of ManTech's mission, cyber and technology solutions group, said: “This acquisition enhances our capabilities in the growing cyber-security market. The HBGary leadership team are recognised thought leaders in this market.

“The combination of ManTech and HBGary will create a broader cyber-security-solution capability for both our commercial and government customers.”

Greg Hoglund, CEO of HBGary, said: “ManTech will give HBGary significant and positive growth, expanding our opportunities. HBGary's commercial customers will benefit from the addition of ManTech's world-class incident-response services, and ManTech's government business will be bolstered with a cutting-edge set of products to protect mission-critical IT assets.”