Wirth will be responsible for directing Brandywine's portfolio management activities, including working with its regional and corporate executive teams "to formulate capital allocation tactics" for the company's existing portfolio. In so doing he will also assist in the company's capital raising initiatives, including joint venture evaluation and transaction structuring. Wirth also will spearhead Brandywine's relationship management and investment committee activities.

Wirth has been with Feldman Mall Properties since 2004. Prior to that he spent seven years with SL Green, an office REIT, where he was CFO and, prior to that, its VP of Finance. Brandywine president/CEO Gerard H. Sweeney says Wirth's strong financial, capital markets and operational experience will enable him to "effectively contribute."

Feldman owns a few million square feet of mall properties. Brandywine owns 25.6 million square feet of mostly class A suburban office properties. Reached at his Feldman Properties office Tuesday evening, Wirth tells GlobeSt.com he spent a lot of time meeting with Brandywine executives prior to the announcement. "I'm excited to join the team and try to help them out," he says. "They have a great reputation."