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.
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, as well as NASA, 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.
Years (in 2027) as the longest operating American A/E Firm supporting the U.S. Federal Government
Years Supporting the Department of Energy at Category I Special Nuclear Material research, development, and manufacturing environments
Years supporting Department of Defense, facility design and maintenance, demilitarization operations and research and development
"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
Customized, streamlined solution for every mission – focusing on communication and quality control.
Providing planning, design, engineering and construction support services for munitions and industrial facilities for the U.S. Army Corps of Engineers and the U.S. Navy as well as other government agencies.
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.