John DeSilvia is a tough-as-nails Brooklyn native and a former union carpenter. A licensed contractor, “Johnny D” earned a degree from the Pratt Engineering School. After graduation he learned the ropes with two of the world’s leading construction firms, then took the plunge and opened his own company, Brooklyn’s Design Tech. On DIY Network’s Under Construction, he demolishes, builds, renovates and refurbishes projects all over the Big Apple. He’s currently building new, high-end and eco-friendly condominiums – a project John labels his “most expensive” to date. And watch him show real homeowners how to cut up to $10,000 from their renovation and remodeling projects on DIY Network’s new series, 10 Grand in Your Hand.