Defense contractor Radiance Technologies Inc. has acquired Open Source Publishing Inc., a provider of open source intelligence support services, said Radiance officials.

The terms of the acquisition are subject to a nondisclosure agreement and were not publicly released, said Eliot Jardines, the founder of Open Source.

“Their corporate culture is very similar to ours,” Jardines said. “Having spent nine years developing and enhancing our unique approach to open source exploitation, I wanted to be sure that whatever firm acquired us would maintain our business model.”

Jardines will remain with the company as director of the Open Source Intelligence Division. Open Source had 13 employees. Radiance has about 250 employees, Jardines said. Radiance revenue in 2004 was $35 million, according to Radiance’s Web site.

Open Source has worked as a subcontractor for Radiance.

Under the acquisition, Open Source Publishing becomes the Open Source Intelligence Division of Radiance Technologies which is based in Huntsville, Ala.