John Castellano

President (Founding Partner)

John has over 38 years of experience in commercial construction. As a company founder, John is a service first oriented leader. His understanding of what the client expects is extraordinary. He combines his vast experience of the trade industries with decades of experience in relationship management to constantly grow and improve GGC National’s footprint. John likes to stay involved in all aspects of our business. His depth of knowledge in all facets of commercial construction has allowed GGC National to grow annually since its creation. Having won two historic preservation awards, along with LEED accreditation, John's level of expertise is unparalleled in our industry. Don’t be surprised if he shows up at a pre bid meeting or jobsite visit. He has instilled a high standard of excellence and customer service to the entire team and fosters a “Whatever it Takes” culture in the company.

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