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When it comes to providing cutting edge mechanical engineering and construction solutions – including design-build, fabrication, installation and maintenance services that promote sustainability at every stage of a building`s life cycle – Shapiro & Duncan is a leader in the Washington, D.C. market.   A third generation family-owned business, Shapiro & Duncan has been serving customers in the D.C. area since 1976. We are the ""Provider of Choice"" for complex commercial, government and institutional design-build projects that require first-rate performance, work quality and customer service.