GreenStar Services Corporation is one of the country's leading heavy mechanical, plumbing, HVAC, electrical and specialty general contractors serving diversified market sectors throughout the United States. The organization specializes in infrastructure, environmental and complex construction assignments.

GreenStar includes three operating subsidiaries: Five Star Electric Corporation, WDF Inc. and Nagelbush Mechanical. Each of the three firms is an industry leader in size, technology, talent and financial strength.

A single-source MEP and specialty contracting provider, GreenStar serves its clients in a broad variety of markets including transportation, infrastructure, commercial, school and university, residential and specialty construction.

The Freedom Tower, the New York Mets Stadium, Citi Field, Time Warner, Goldman Sachs, Miami's Regency Hotel, New York Hospital as well as major transportation and environmental projects such as South Ferry Terminal and Whitehall Ferry, Owls Head and Jamaica Bay Water Treatment Facilities are just a few of GreenStar's signature assignments.

About Our Companies

The Northeast’s leading electrical contractor, Five Star Electric is a full-service, electrical contractor with over 1800 employees serving all market sectors in the greater New York area. Learn More


With over nine hundred employees, WDF Inc. has an 80 year history of providing outstanding plumbing, HVAC, heavy mechanical and specialty construction solutions for its customers.
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Nagelbush Mechanical is one of the leading mechanical and plumbing contractors in South Florida. Its 41-year history confirms its prominence as the ‘go-to’ regional construction resource in its trade specialty. Learn More

Our Name Says It All

Yes, we’re green and committed to sustainable construction. We have a collective success record of over 200 years, serving the country’s leading owners, developers and builders.

McGraw-Hill's New York Construction Magazine ranked GreenStar as New York's #1 Specialty Contractor. Read More...

GreenStar Priorities

Customer Service, Constructability, Quality Construction

Each GreenStar project is a signature one. The firm's operating philosophy focuses on innovative construction approaches and strict project management controls to ensure that budget, schedule and quality construction are a consistent end result. Our track record speaks for itself. Read More...