Boulder, Colorado-based Webroot, a provider of Internet security software, said today that it has hired two new executives at the firm. The company said it has hired Don Beck as General Manager and Senior Vice President of Enterprise SaaS, and Mark Tickle as the firm's Managing Director for SaaS in the EMEA. Webroot snags Beck from N-Computing; he has also served at Postini, IBM, J.D. Edwards, Brio, and Adobe. Tickle comes to Webroot from Websense, BlackSpider, SurfControl, and Vignette.