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 – active and reserves), Department of Homeland Security, Department of State, Department of Energy, and other government agencies critical to the U.S. National Security Mission. Mason & Hanger has provided best-in-class architectural and engineering (A/E) services to the federal government on thousands of projects in 165 countries. 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

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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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Learn more about Mason & Hanger's nearly 200-year history.

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