Arbor Networks, the information technology security firm acquired by a Texas network security company in a deal announced Aug. 9, plans to add 30 high-tech jobs to its research-and-development headquarters in Ann Arbor.

The hiring plan follows the official Aug. 31 close of the company's sale to Plano, Texas-based Tektronix Communications, which is a subsidiary of $12.2 billion Washington, D.C.-based conglomerate Danaher Corp. [NYSE: DHR].

The growth plans underscore the company's commitment to the company's  R&D headquarters in Ann Arbor and illustrate its faith that the region's software community can supply enough talent to deliver new security technologies.

"We continue to be able to pull really high-quality talent from a local pool as well as attract it from all throughout the country to relocate here," Arbor Networks chief technology officer and co-founder Rob Malan said.

The firm plans to hire about 30 new software engineers and researchers by the end of 2011, Malan projected. The company currently employs about 90 workers at its 22,000-square-foot office at the South State Commons complex.

Tektronix maintained all of Arbor's 275 employees worldwide, Malan said.

The firm plans to operate Arbor Networks as an independent subsidary. Arbor's security software monitors Web traffic on more than 70 percent of the world's Internet service providers.

"They loved Arbor for the team, for the products and didn't want to break it up at all," Malan said. "It's been an incredibly seamless, painless transition."

Terms of Arbor's sale to Tektronix were not released, but people familiar with the deal have described it as a big win for the firm's investors and employees. The firm was founded in 2000 by U-M computer science engineering professor Farnam Jahanian and Malan.

"Arbor Networks is ideally positioned to continue on its growth path by protecting the availability of networks and services around the world as the size, complexity and frequency of network security threats continues to grow," Rich McBee, Danaher group executive, said in a statement in August.

 "Arbor Networks expands our portfolio of leading companies in the communications and enterprise markets."

Contact AnnArbor.com's Nathan Bomey at (734) 623-2587 or nathanbomey@annarbor.com. You can also follow him on Twitter or subscribe to AnnArbor.com's newsletters.