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Foundry Loses CTO to F5

Karl Triebes, CTO and VP of engineering at Foundry Networks Inc. (Nasdaq: FDRY), has joined testing titan F5 Networks Inc. (Nasdaq: FFIV), people close to both companies say.

Triebes, one of the switch maker's earliest employees, is en route from Silicon Valley, where Foundry is located, to Seattle, where F5 is, and couldn't be reached for comment. His departure was announced to Foundry employees late last month, spokeswoman Jill Shanks says.

Triebes's primary duties at Foundry are now in the hands of John Burger, VP of engineering.

"That's definitely disruptive," says analyst Shaw Wu of American Technology Research Inc.

Disruptive, but not debilitating. "I think they have a deep bench. The core guys are all still pretty much there," Wu says.

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