Building a More Secure World.

Mason & Hanger, a Day & Zimmermann company, is dedicated to providing architectural and engineering (A/E) services specializing in the worldwide design of secure, mission-driven facilities.

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For nearly two centuries, Mason & Hanger has been a trusted partner of the U.S. Department of Defense (Army, Navy, Air Force, Marines, National Guard), Department of Defense Reserves, Department of Homeland Security, Department of State, and Department of Energy, among other government agencies critical to the U.S. National Security Mission in providing best-in-class architectural and engineering (A/E) services. We have served the federal government on thousands of projects, in 48 states and 164 countries. With offices in Lexington, Kentucky and Richmond, Virginia Beach and Woodbridge, Virginia, Mason & Hanger has ranked nationally among the Top 15 A/E firms in Government Building Design.

"We provide smart, innovative solutions for difficult and complex design challenges to support the U.S. Government with their security missions globally."
-Benjamin A. Lilly, President, Mason & Hanger



At Mason & Hanger, we provide the opportunity to join a successful team of innovative thinkers, including many of the industry’s most talented individuals. Our mission of building a more secure world has a direct impact when it comes to protecting U.S. national security interests at home and abroad. With a foundation built on our values of Safety, Integrity, Diversity and Success, we're committed to creating an inclusive and team-oriented environment, offering some of the most competitive benefits, and talent development through training and growth opportunities.

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