GreenStar Services Corp. is ENR New York’s Top Specialty Contractor of the Year. ENR’s regional editors made the selection based on GreenStar’s strong portfolio of projects in 2010 and its ability to keep sales fairly steady in one of the industry’s most challenging years. GreenStar broke ground last year on Tower 3 of the World Trade Center, and was active in many other major deals including a $106-million homeland security project.