Mattamy Homes, the largest privately owned homebuilder in North America, recently hired Jim Birkholz as the president of the company's Tampa-Sarasota Division. Jim will oversee all aspects of Mattamy's business—including land acquisition and development, marketing, sales and construction—in the Tampa and Sarasota markets. Birkholz previously worked as the company's Minnesota Division president from 2008 to 2009. Mattamy has built neighborhoods in Sarasota and Lakewood Ranch and is currently working on Renaissance at West Villages in Venice.