Greenport Harbor Brewing Company is getting bigger, and fast. The company launch in 2009 with little more than two owning partners and a brewer. Four years later, the brewery employs more than a dozen workers and is in the process of building a second brewhouse. But the brewery’s quick expansion has not swayed its resolve to maintain control over their own product and quality. I recently met with Head Brewer DJ Swanson. He pulled his head out of a steaming fermenter to greet me upon arrival at the fire house-turned-brewery that dates back to the early 1900s. The cozy historic…