The office vacancy rate in Miami’s Central Business District is hovering at about 24%, according to Grubb & Ellis, and the flight to quality in the past year has been well-documented. But one older class A building has seen occupancy rise to 90%—and climbing—despite a major tenant loss in 2010.

Brickell Bay Office Tower, a 32-story, class A office building, has logged some impressive wins after H.I.G. Capital departed. Recent additions to the building’s tenant base include Right Space Management, Syntel, Hiscox, Trans American Equity Partners Bancard Financial Services, and 1st United Bank.

GlobeSt.com caught up with Christian Driussi, vice president for Brickell Bay Office Tower, to discuss how Brickell Bay is keeping vacancy rates down, defying the flight to newer buildings, and the challenges that remain in Downtown Miami’s office market.