Chany Rosen is always on the run. Perhaps that's why at just 28 she's already made a name for herself in New York City's cutthroat property business.

The expeditor gave up a teaching career to help landlords and other clients find their way through the city's often byzantine Department of Buildings. Rosen's 15-person team at Brooklyn-based Cavalry Associates, which she formed with her brother, Yoel Bochner, handle everything from code violations to zoning issues.