Yahoo! will use its space, located at 1302 and 1350 Mathilda Ave., for software engineering. Juniper Networks will use its space, at 1220 Mathilda Ave., to support its advanced engineering and software development. Other tenants in the project include Lockheed Martin, Lucent Technologies, Intel and Applied Materials.

Don Reimann, a senior vice president at Colliers International in San Jose and lead leasing agent for Mathilda, says the Yahoo lease signifies the company's further commitment "toward centralizing its primary operations" at Mathilda. As for Juniper Networks, Reimann says the follow through on its planned expansion is a good sign in the face of what he described as "some slowdown in the race for Silicon Valley office space."

Mathilda Research Centre features wraparound glass, state-of-the-art fiber optic infrastructure and an outdoor amphitheater with surround sound. Hotels and restaurants are located nearby and a light-rail station serves the site. The owner is listed as Mathilda Associates II LLC.

Reimann, Gregg von Thaden and Jon Condrey, all of Colliers, represented Mathilda in the transactions. David Tipton and Tom McGovern of Cresa represented Yahoo! Steve Gibson and Joan Haynes with Colliers represented Juniper Networks.