TSI Corporations (TSI) is a locally owned business, established in 1977, specializing in the design, engineering and installation of building envelope glass systems, ornamental metals, and aluminum metal panels. TSI has completed 600 projects in the greater Washington DC and Baltimore areas.  Our target markets are Class A office, healthcare / hospitals, higher education, sports facilities, mixed-use communities, and exterior renovations.  Over the past 5 years, the company focus has been on design assist projects within these sectors, accounting for nearly 90% of our projects.

Recognized for nearly 20 years as one of Glass Magazines Top 50 glaziers and Engineering News Records Top 400 Contractors, TSI Corporations has grown to become one of the largest local Building Envelope/Glass and Glazing companies in the Baltimore — Washington D.C. area. Our market-focused organization is structured to help fulfill our mission to become an industry leader in the management and installation of building envelope systems and architectural while achieving a true understanding of our clients, their visions, and providing unrivaled results and customer satisfaction.